Vidya Sinha, (Vidya Balan) lives with her crippled daughter Minni, in a small town of Chandan Nagar. One day when she was out for work, her daughter gets kidnapped and while looking for her, Vidya meets a deadly accident. The accident case is investigated by Sub-Inspector Indrajeet Singh (Arjun Rampal). Soon Indrajeet learns that Vidya is actually a wanted criminal Durga Rani Singh who has been charged for murder and kidnapping. As Indrajeet dives deep into the case, thus reveals further mystery about Durga's dual identities. The story further unfolds the mysteries of Durga's life and, leads the narration towards the climax.