A car accident has put Vidya Sinha (Vidya Balan/Durga Rani Singh) in a coma. It happened while she was still in the shock of her daughter having been kidnapped.
Sub-inspector Inderjeet Singh, who is investigating the case, not only realizes that he knows Vidya Sinha personally, but also learns that she is in fact Durga Rani Singh, who is wanted in a kidnapping and murder case.
The mystery of Vidya’s dual identities is deepened further by the incidents written in her diary. The story unfolds page by page to answer the many intriguing questions and also to reveal the story of her tumultuous life.