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Sofía, a highly observant student, makes friends with the new kid, Javier Williams. Luis, a defenseless person, gets bullied by Gerry. During a school assembly, a mysterious hacker reveals that popular student Isabela is transgender by blackmailing Raúl, Natalia and Gerry, threatening to leak their secrets. As a result, Isabela's boyfriend, Pablo, dumps her. Sofía and Javier investigate to find the hacker while the hacker texts Isabela to take revenge on those who disclosed her and also Pablo, to which she replies "yes."

The hacker leaks the secrets of Raúl, Natalia, Pablo, and Gerry by Isabela's request. Raúl's private videos reveal his father, a politician, is corrupt. Natalia is revealed to be stealing the money she collected for the NONA party. Gerry's search history is leaked which shows that he watches gay porn. Finally, Pablo is revealed to have sent his intimate photos and videos to his "Honey Bunny," indicating he had been cheating on Isabela already. Nonetheless, Gerry still humiliates Isabela for her gender identity which evokes a mutual fight between Raúl, Javier, and Gerry. They are all called to Principal Quintanilla's office while Sofía shows up to get clues about the hacker. While Sofía is in Quintanilla's office, she discovers that he plans to propose to Sofía's mother, Nora, who he is currently seeing romantically. Sofía also gets dragged in the game when the hacker starts sending photos of her and her supposedly deceased father, Fernando. Natalia, Raúl, and Gerry face the consequences of their blunders at their homes. Luis admits that he is the real hacker and, as a result, is expelled from the school.

Enraged by Luis's revelation, Gerry decides to take revenge on him along with Pablo. Javier overhears their plan and follows them. Sofía approaches Luis to tell him that she knows that he lied about him being the hacker. He admits that he lied so he could get out of being bullied by Gerry. Gerry and his minions run after Luis to beat him up but Javier intervenes. Natalia is asked by Principal Quintanilla to return all the money she stole, but she already spent it all. She tries to collect money by selling her expensive goods. The hacker puts on a live event for Gerry to beat up Luis. Principal Quintanilla hears of this beforehand and locks Gerry in the auditorium. The students gather outside the school for the fight while Luis arrives too. Alex, a socially distant girl, unlocks Gerry, and he runs to the location of the fight. This leads to a massive affray. Sofía and Javier try to save Luis by evading the scene but Gerry drags Luis out of Javier's car and punches him hard, knocking him over. Luis hits the pavement and goes into a coma. Fernando leaves the book club to avoid Sofía so that he might not go to prison.

Raúl discovers that his parents have fled the country to avoid prosecution and left him a large sum of money. He buys an expensive bike and plans to throw a party at his house and invites the whole school. Gerry gets suspended from school because of his aggressive attack on Luis. Sofía receives a text from the hacker to go to Raúl's party. Sofía obeys and attends the party while her mother goes on a date with Quintanilla. At the party, the hacker plays tricks on Sofía while Natalia discovers someone who lends money illegally. Quintanilla proposes to Nora to which she declines, fearing for her daughter's reaction. Sofía then notices the hacker's logo on walls and glasses which take her to the roof where she encounters Alex. Alex asks Sofía to jump into the pool from the roof as the hacker says or he will reveal her secret girlfriend. After much disapproval of Javier, Sofía jumps into the pool anyway. Javier, upset, leaves. Maria, Natalia's innocent-looking sister, is revealed to be Pablo's "Honey Bunny." Maria asks Pablo to stop seeing her as for the sake of her friendship with Isabela but then has sex with him. Raúl, having a crush on Sofía, kisses her. Alex's girlfriend is revealed to be their Biology teacher, Gabriela. Raúl and Sofía go in the basement to dry Sofía's clothes where they experience a shutdown. As Raúl goes to check the fuse, Sofía is kidnapped by someone.

After holding Sofía hostage, her kidnapper takes her bracelet, subdues her again and drops her unconscious at her house. While in the truck, half-awake Sofía gathers clues. At home, Sofia argues with her mother and tells her to think about herself and not Sofia. Sofía reassembles the gathered clues and finds the truck with the help of Javier and Raúl. The truck turns out to belong to Bruno, the school's IT guy. In Bruno's apartment, Sofía finds something of Javier's but does not tell him. After an attempted interrogation, Bruno escapes them and Javier is framed. At the school, Principal Quintanilla has sex with Susana, a married teacher.

Sofía and Raúl report to Quintanilla that Bruno is affiliated with the hacker. He may have also escaped with all his belongings. Sofía discovers that Javier had previously killed his friend, Guillermo Garaby, during a rite of passage. Maria shows symptoms of pregnancy. To pay Rosita the funds she had collected for the NONA, Natalia starts working for Joaquin, a drug dealer who gives her a loan. Sofía and Raúl find a newspaper article of Guillermo's death and Sofía's bracelet in Javier's locker. Gerry keeps visiting Luis out of guilt. Sofía has memories of her father's death. Stressed, she runs to Raúl and has sex with him.

A look back at the last semester, Raúl invites Natalia, Gerry, Maria, Pablo and others to his house where he shows off his father's antique collection and money. They start to record videos there but are interrupted by Raúl's father. Raúl gets blackmailed by someone unknown, later revealed to be Bruno, for ten thousand pesos or he will leak the videos showing his father's corruption. Raúl realizes that his friends are only with him because of his money. Sofía desires a world without secrets and Raúl forms a plan to give her just that. With the help of Bruno, Raúl discovers that Fernando, Sofía's father, is alive and using an alias. Raúl is revealed to be the one who leaked all the private information about everyone. He was also the one who blackmailed Alex to unlock Gerry and force Sofía to jump off the roof at the party. Furthermore, he was the one who sent Luis the lines to speak while confronting everybody at the huge fight. Jealous of Javier, Raúl also framed him to be the hacker so Sofía would turn on him.

Sofía and Raúl report Javier to Quintanilla by showing him the video of Guillermo's murder. After initially reluctant to do so, he suspends Javier after Raúl blackmails him by threatening to leak his sex video to Nora. Rosita succeeds in organizing the NONA. Raúl helps in his father's arrest. At NONA, Natalia sells drugs to make up for her loan and Maria confesses to Pablo about her pregnancy, but he reacts indifferently. At the hospital, Luis dies in his coma, which infuriates Gerry. Pablo tries to rape Isabela but when Maria comes to her defense, he spitefully reveals to Isabela that Maria was his "Honey Bunny". Angered, Isabela ends her friendship with Maria. Sofía tricks Raúl into confessing that he is the hacker, records his confession with the help of Javier, and plays it at the NONA. Raúl tries to make it out of the NONA by threatening to leak everyone's secrets, but Pablo punches him. As a result, Raúl reveals the secrets of everyone at NONA, including Sofía, Javier, Alex and Maria. The revelations cause a massive affray again during which Natalia's collected money is lost. Gerry, upon realizing Raúl is the hacker, shows up to NONA and confronts him with a gun, demanding an explanation over his actions. Raúl reveals that Luis liked Gerry. Gerry tries to shoot him, but Javier gets shot instead trying to intervene. The show ends with an aerial shot zooming out.

Javier survives the gunshot (which further boosts his popularity among girls), Raúl is still vilified by his classmates over his role as the hacker, Nora and Quintanilla are engaged, María finds support in Claudia after Isabela and Pablo abandon her, Gerry is wanted by the police for murdering Luis and Gabriela is fired from National School after her romance with Alex is exposed. Two months later, the entire school mourns Luis and hosts a ceremony to honor him. However, another hacker launches a threatening message to everyone, demanding that they hand over Gerry and warning that "You can't bury the past", starting to target each of the students, first with Gerry's former friends, Darío and Ernesto, whom they bury alive in a cemetery but are subsequently saved by Sofía and Javier. A hooded figure, revealed to be Raúl, attacks Javier and flees on his motorcycle. Nora is upset at Sofía for hiding the fact that her father is still alive. The drug dealers threaten Natalia into giving them the money she owes.

Lulú, Quintanilla's secretary, arrives at the school to find the walls spray-painted and a half-naked Alex gagged and tied in a classroom and releases her, before also showing the lockers spray-painted with the word "REVENGE" on them, which leaves very clear the Avenger's mission: to avenge Luis. Alex does not remember anything that happened to her, and Sofía deduces that she was drugged. Raúl's return to the school leaves everyone infuriated, prompting a fight between him and Pablo, which is soon broken up by the gym teacher. Quintanilla states that he will no longer protect Raúl. María refuses to talk to Pablo after everything that happened between them. After a failed attempt to obtain the money she owes, Natalia discovers that Raúl is hiding Gerry at his house, but he blackmails her into staying quiet by threatening to reveal her involvement with the drug dealers. Jordi, one of the dealers who is in league with Natalia, leaves the city to avoid being killed over the money. Rogelio's unsuccessful attempt to reconcile with Nora results in him being arrested, due to Nora having secretly tipped off the police over his whereabouts, just as Javier and Sofía investigate Luis' house, which is set on fire as another warning from the Avenger, forcing them to narrowly escape.

Rosita plans a birthday party at her house, despite Sofía and Javier trying to convince her to call it off, fearing a possible attack from the Avenger. Quintanilla is removed as principal of National School by decision of the school council, given how poorly he has been handling the situation with the Avenger, and Susana takes over as his permanent replacement. Gerry feels guilty for murdering Luis. He breaks his self-imposed curfew by leaving the house and going to a gay bar where he meets a handsome man named Felipe. Javier and Natalia take a romantic interest for each other, much to Sofía's jealousy. Sofía, realizing that the Avenger has spiked a bottle, tries to save everyone by throwing off their drinks, just as another fight breaks out between Raúl and the still outraged Pablo which ends with María, who has drunk from the spiked bottle, falling to the ground and overdosing uncontrollably.

Pablo feels immersed with guilt after finding out that María has aborted her baby. In her first day as principal, Susana implements some controversial measures such as inspecting the students' bags and forbidding any kind of public display of affection. Alex is upset when Gabriela, now unemployed, has to leave for Spain after accepting a job offer there. Javier and Sofía clash with each other over Natalia being attacked and kidnapped by the Avenger as Sofía finds her story unconvincing and believes she knew their identity, to which Javier accuses her of being jealous of their new friendship. Nora and Rogelio don't tell Sofía that she has turned him in to the police. Sparks fly between Gerry and Pipe as they continue bonding. Pablo confronts María over her abortion and suspects Claudia convinced her to do so. Still at crossroads, Natalia leans on Javier for help with the money. He tries to ask his father but he refuses, but Javier still agrees to find a solution. Gerry suddenly goes missing and Raúl, panicking over what the Avenger might do, admits to Sofía that he has been living at his house and enlists her help in looking for him.

Sofía and Raúl track Gerry's GPS location to a massive queer club called Lust, unaware that they are being followed by Pablo, who snaps a picture of them and sends it to Javier. Meanwhile, Natalia, in order to get the money, uses a sugar daddy app under the alias of Rosita Berry and María teams up with her. She is matched with an older guy named Gio, who wants to meet at a restaurant. However, she abruptly leaves the date after he turns out to be none other than Javier's father. Sofía and Raúl eventually find Gerry but before they can corner him, Pablo furiously charges at Raúl, calling him out for harboring a killer. Gerry seizes the altercation to escape. Javier finds Sofía (at Nora's request; though she refuses to return to her home) outside of the club and leaves to see Natalia instead, still thinking that she has been spending more time with Raúl. Heading back to his place, Raúl and Sofía sleep together (as they do Javier and Natalia, Gerry and Pipe, Alex and Gabriela, as well as Rosita, Darío and Ernesto, engaging in a pre-agreed threesome); Raúl promises not to lie to her anymore, but it doesn't change the fact that he's still keeping a secret that Quintanilla cheated on her mother with Susana. As Sofía is taking a shower, Raúl is tasered by the Avenger who forces him to unlock his safe, thus stealing all of his money for an unknown purpose and Sofía quickly runs to check on him.

Pablo spreads out the news about Raúl and supposedly Sofía hiding Gerry, causing the whole school to turn on her, including Alex. Susana calls them both to her office for questioning where they try to explain that Pablo is messing with them, to no avail, as she considers expelling both of them, although Raúl, unafraid, uses his blackmailing techniques on her. Remembering it is Quintanilla's farewell party, Sofía deduces that he is the Avenger's next victim. María turns to Javier's father to explain him the truth about the money Natalia owes, but is rejected. Pipe finds out about Gerry's true identity and angrily kicks him out of his house. Taking a sip from a spiked drink, Quintanilla hurries off to the restroom where the Avenger locks him up and attacks him with a nest of bees that sting him until he is released and, humilliated, lashes out at the students for making a fool out of him and that it is not his fault what happened to Luis. María and Claudia kiss, but María abruptly leaves in shame. Sofía confronts her mother after figuring out that she had her father locked up, having found some papers related to an arrest warrant on him. Continuing to work together, Sofía and Raúl look over Luis's drawings, most of them mirroring the comeuppances of the Avenger's past victims. They realize the Avenger is fulfilling Luis's wishes and wonder who might be the next victim.

In the past, the lonely Luis is shown drawing each of the students, Quintanilla included, and their predicted punishments. Sofía shows the drawings to her father, noticing that most of the humiliating punishments are similar to the drawings except for Gerry, who is the only one without one, and Raúl whose money was stolen. She later finds out about Quintanilla's affair with Susana, when he arrives to take her home, thus severing ties with Raúl for keeping the information from her and demanding that Quintanilla tell Nora or she will. Quintanilla tries to tell Nora about the affair until the gym teacher, who is Susana's husband, shows up and punches him over it. As a result, the angered Nora ends her engagement with him. Meanwhile, Damián agrees to give the money to Natalia only if she brings María, who starts avoiding Claudia after the kiss. Alex is revealed to be the reason why Gerry became hostile towards Luis and teamed up with Darío and Ernesto to bully him since she encouraged him to show a drawing of the latter, which Luis eventually did, despite some hesitation. In effect to that, Gerry used this new personality to mask his true feelings as to avoid being made fun of at school after his homophobic father accused him of being gay. Susana searches up the students' bags and lockers to see if there's any flammable material that was used in Quintanilla's attack, but no proof is found. Susana also expresses her disappointment on how much Sofía has "changed" and she says the same about her, implying her affair with Quintanilla, although Susana is unaware that she knows. Gerry, still feeling guilty for his actions, visits Marta and they have a heart-to-heart conversation. He decides to turn himself in to the police. Rosita, still believing that she played a part in hiding Gerry, doesn't heed Sofía's warnings about the Avenger wanting to target her, even though she is shown a drawing Luis (whom she used to nickname "Luiser", similar to the word "loser") made of her would-be punishment. Gabriela leaves for Spain without Alex and breaks off her relationship with her, leaving Alex heartbroken. Pablo, still hellbent on getting revenge on Raúl, arrives at his house to beat him up, forcing him to confess to his crimes until Gerry shows up to defend him. At the same time, Javier, still distant from Sofía, walks in on his father and Natalia making out (in order to get the money) and becomes visibly upset that he also beats him up and Sofía collapses to the ground after popping one of her pills that turned out to be spiked by the Avenger, prompting Rosita to rush to her aid.

Natalia catches up to Javier and tries to explain the situation but he breaks up with her. Raúl tells Pablo he knows that he has known the whole time about Isabela's gender identity and that he still truly loves her, criticizing him for not being man enough to admit it. Goaded by Raúl, Pablo hits him once more before he leaves. Gerry wants to turn himself in. However, Raúl instead suggests that he text the Avenger so they can get to the bottom of the mystery. Sofía never actually took the pills and staged her accident to make it look like she has fallen for the Avenger's plan before escaping from the hospital. She and Javier, after Raúl and Natalia lied to them, team up again to keep investigating the culprit. Meanwhile, María is contacted by one the dealers to inform her that they have kidnapped Natalia and demands the money, threatening to harm Natalia if she tries to call the police. Claudia decides to help her and they manage to sort out the problem with the kiss. As Gerry arrives to the school, Raúl, who follows suit, is attacked again by the Avenger and snatches the gun, which Gerry previously used, from him. Alex is revealed to have orchestrated the attacks on the students, including spray-painting the lockers, setting Luis's house on fire, simulating her own kidnapping and leaving Quintanilla locked up in the men's restroom to be stung by the bees, as she wanted everyone to feel guilty as she was for Luis's death, angered at their injustice after they did nothing about it. She even stole Raúl's money in order to start a new life with Gabriela. Alex then threatens Gerry at gunpoint into jumping off the roof. However, Sofía manages to talk her out of it, saying that she is not a killer, and a repented Alex drops the gun, as she sobbingly apologizes to Sofía. Javier then picks up the gun and aims at Raúl, demanding he give him his money to save Natalia's life, but Raúl defiantly refuses. It is revealed that he told María and Claudia the money was hidden in Luis's locker. Sofía, Javier, Raúl, María, Claudia and Susana, who was still at the school, wrestle over the money bag, ending with Susana falling off the roof to her apparent death, along with the bag. Leaving her to bleed out, Pablo snatches up the money and drives off, with Javier, Alex, Gerry and Claudia looking on in horror, while Sofía, Raúl and María stand over the edge of the roof looking at Susana's lifeless corpse. The season ends with another aerial shot zooming out.