Kahaani 2 is a 2016 thriller film starring Vidya Balan and Arjun Rampal. The story revolves around Vidya and her daughter Mini. When Mini is kidnapped, Vidya rushes to her rescue, but meets with an accident and slips into coma. Inspector Inderjeet who investigates Vidya’s case, finds a diary at her home which has details about her dark past. The police suspect that Vidya is not her real identity. Who is she then?