Movie Detail: Avinash comes to Kolkata to search for his only son and finds himself engulfed with too many people interested in him. His only lead is a telephone number given to him by a cop before coming to Calcutta. As soon, as he lands in Calcutta, he needs a place to stay, in a chawl, in Calcutta, here, he meets up with Reema, a novelist, who is supposedd to be doing som research for her novel. The room that Avinash gets is ocupied by Bulbul. She refuses to vacate, and stays on, and Avinash, stays there too. There are flashbacks in the story. Sanjana and Avinash once lived in Kolkata with their only child, a son. One day, Avinash witnessed a crime being committed and came to the assistance of the victim, and took him to hospital. This did not augur well with his assailants, and they killed Sanjana and abducted their child. The police was involved, but unable to trace the child. A heartbroken and desperate Avinash apparently decides to take matters in his own hands and begins inquiring.