A retired forest officer's sons Abhijith, Abhilash aka Appu along with their mother Padma live happily. One day, they find that their family friend poet Sidharthan has bequeathed his properties to Abhijith aka Allu, the younger boy in the family, in his osyath (will). Suspicion raises in the mind of Appu, who thinks that Allu is the son of the late poet. His doubts create problems in the family and he has to leave the house for certain reasons..