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Rajan, a radio engineer, is found murdered in Madras during the tense World War II era, amid fears of a Japanese air raid on the city. CID officer Sivanandham investigates the case as each suspect—Rajan's wife, lover, relatives, and neighbors—narrates a different version of events, revealing hidden motives and secrets that lead to the truth.
Venu is a very poor student and seeks to come out of the hostel by being unable to bear its expenses. Thus, he shifts to a lawyer Anand Rao's summer-house, who gives it to him free of cost. Venu has a brother who is a blacksmith and funds Venu's studies and his daughter's needs in their village. Anand Rao's wife doesn't agree to give their summer house to a bachelor, so Anand Rao insists that he is married.
Sagar travels to Sneha's house to thank her for a deed she did to him years ago and confess his love to her.
