Lanka is a modern take on the Ramayana with Sita's life being saved by Vibhishan (Raavan's brother) from Raavan.

"Lanka" begins in current day Mumbai with Anju (Tia Bajpai) telling about her past. Jaswant Sisodia (Manoj Bajpayee) is the don of a small town in UP, India called Bijnor. He rules the place and the police and politicians support him. He is in love with Anju, a doctor. Her father is the Chief Medical Officer of Bijnor. Anju is actually sexually exploited by Sisodia. He every night after taking drinks comes to her house and sleeps with her. She tries to commit suicide but her father stops her. She tries to run away but the house is guarded by Sisodia's men. Her father tries to meet the cops but they don't want to entertain him. Also, we never know how Anju became Sisodia's mistress.