Achuthan Nair (Thilakan), an honest and sincere police constable, has a loving family consisting of his wife Ammu (Kaviyoor Ponnamma), two sons and two daughters. Achuthan Nair wants his elder son Sethumadhavan (Mohanlal) to be a police inspector. He shares a cordial and amiable relation with his son. Sethu is engaged to Devi (Parvathy Jayaram), the daughter of Krishnan Nair (Sankaradi), his maternal uncle. One day, for charging a petty case against the son of a Member of Legislative Assembly, Achuthan Nair is transferred to Ramapuram police station. The family also shifts to Ramapuram.