Two childhood friends from Chennai, Appu and Kuppu share a close bond with each other. Appu lives with his newly married wife Ranji and Kuppu lives with his mother. All goes well for the friends until Appu finds Kuppu in his home unwelcomed, which raises his suspicion and he starts distrusting his wife. Why Kuppu visited Appu's house? Why does he behave in a peculiar way?