A simpleton Unnikuttan (Dileep) has an unhealthy attachment with central jail. He was born and bought up there with his father Kesavan (Siddique (actor)) and mother Janaki (Vinaya Prasad) before being transferred to child care facility at the age of six. Unni finds solace and happiness inside jail, for getting in he fills in as a substitute for real-life punishments of petty crimes committed by others. Unni, who is in his late 30s, isn't married and many whom he knows advises him to marry someone to be felt loved and not to go to jail as a substitute. In jail he falls in love with Radhika (Vedhika), and to marry her he tries to solve her problems as she witnessed a murder done by a Minister. When he meets Radhika, who is jailed in drug case. She discloses her love to Unnikkuttan but is not now ready because she is awaited by the minister to be killed. She describe all story behind this wrong case against is because that she witnessed the minister murdering Karunan (Dinesh Panikker).