‘Paapi’ is a story of a small town girl, Pia, who falls in an Internet trap. She falls in love with a friend, Rahul, whom she has never seen but met on Internet. The feeling between them grows and Rahul informs Piya that he'd be coming to Haridwar to meet her. Elated and blind in love, Pia gives her life and love to the boy. They get married and she dreams of a future with him only to be hard hit by reality that the man she gave her life to is not the Rahul she met on Internet. Priya who sets out to seek truth in turn gets betrayed when she finds that her husband Rahul's real identity as Aditya Chaudhary. She is being duped and denied justice. When she begs him for justice, Aditya refuses to recognize her and with nobody to turn to, Priya decides to end her life. However, before that she finds a saviour in Nirmal, a lawyer who is ready to fight her war of justice. Piya finally gets justice with the help of the lawyer.