Black Butterfly (2013 film)

The story begins with flashbacks. Benny (Mithun Murali) who is interviewed by Police Inspector C.I Nandakumaran Nadar (Muthuraman) explains his life story. He started working as a cook at a roadside store in Tamil Nadu at a young age, due to debts accumulated by his family. He works at the store for eight years and was never was able to see his mother, who passed away due to an accident. He later attacks the owner of the store who hid the information on his mother's death and flees back to his home state of Kerala, where he starts working at a petrol station. While working at the petrol station, Benny encounters Reena (Malavika Nair), who is a maidservant at a nearby apartment buildings. Benny falls in love with Reena.

Aarthy (Samskruthy Shenoy) lives in one of the apartment buildings. Deepak (Niranj) is a student who resides in the same building. Deepak is a spoilt brat and the first time they meet and start interacting at Aarthy's flat, Deepak records Aarthy's under using his phone without her being aware. Aarthy falls for him without knowing his true intentions and Deepak too is attracted to Aarthy.

Deepak seizes the opportunity and invites her to a beach resort. During this time, he shoots video clips of her private moments on the beach and also hides his phone in the bedroom of their room at the resort, where it also records her exposing her body. When Deepak and Aarthy head back home, Deepak's car breaks down on the road. As he leaves the car to get a mechanic, Aarthy unknowingly gains access to Deepak's phone and is aghast when she sees the videos. She deletes it and takes away his phone's memory card, and cuts all forms of friendship with Deepak. Deepak gets frustrated when he realises that Aarthy knows about the videos, and she threatens to approach the police regarding Deepak's acts.

Deepak plans to ruin Aarthy's life by engaging in an acid attack but Reena accidentally intervenes and thus, sustains serious injuries in the process. The movie picks up speed as the corrupt Police Inspector C.I Nandakumaran Nadar begins investigations. Nandakumaran negotiates with Deepak's mother, but refuses later due to her stubborn character. He completes the investigation with Deepak as the culprit and charges him with the murder attempt. But Deepak's mother approaches a high-ranking minister with whom Nandakumaran has close relationship and asks him to intervene. The minister and Nandakumaran negotiate, with Nandakumaran agreeing to release of Deepak from the investigation. They then try to frame Benny for the murder attempt.

Benny is arrested, but refuses to accept that he was responsible for the murder attempt. Benny still refuses even though the police violently beat him up, in order to force him into accepting that he was responsible. Nandakumaran then blackmails Benny into standing in the shoes of the accused in front of the court, if he wants to cure Reena. Benny accepts and is sentenced for several years in prison. Later, Benny's friend reveals to Reena that Benny did not commit the crime and is falsely accused in order for her to be cured. She realises that Nandakumaran has cheated her and Benny. Angry, she gets to the court and sees Benny being taken back to the prison in a police bus. After Nandakumaran celebrates the closing of the case in a call to Deepak's mother, he is handed a note by Reena where she vows to punish him for cheating Benny and her. Nandakumaran reacts, but Reena throws acid on him. She is immediately attacked by police officers on the scene, but was rescued by lawyers nearby who pulls her to safety.

Reena was arrested and as enquiries run course, the judiciary finds Benny innocent and releases him. Reena is sentenced to seven years in prison for the acid attack on Nandakumaran. In the final scene, Benny meets Reena in prison and proposes his love and tells her in tears that he will be waiting for her. The movie ends as he leaves the cell and with the disfigured face of Reena shown on screen.

• Mithun Murali as Benny
• Malavika Nair as Reena
• Niranj Maniyanpilla Raju as Deepak
• Samskruthy Shenoy as Aarathy
• Janardhanan as Lazer
• Rohini as Benny's mother
• Sithara as Aarathy's mother
• Seema G. Nair as Mary, Reena's mother
• Surabhi Lakshmi as Ramani
• Nelson Shoorandu as Kanjavu Vaasu
• Sukumari as old orphan lady who was cared by Reena
• Ganapathi S Poduval as Sameer
• Muthuraman as C.I Nandakumaran Nadar