The story of the movie is based on courage and determination of Pregnant women who had come to Kolkata from London in search of her missing husband named as Arnav Bagchi. In the quest of finding her husband, she came to know that her husbands identity dont even exist in the city. There have been no records of either hotel where her husband stayed or flights which he had taken to come to Kolkata. In the quest of finding her husband a police inspector Rana helps Vidya. The story gets more intense when People involved in the interrogation by the police start to get killed. In other words, Kahaani is one the best Powerpack thriller movie, where suspense remains consistent until the end of the movie. Watch Kahaani full movie online.