Dr. Isaac Peter (Mammootty) moves into the new home with his wife Clara (Srividya) and daughter Sicily. Clara is very suspicious about Isaac and his interactions with women. She doubts Isaac for being a philanderer. Isaac who bears all her insults becomes a topic of laughter among the neighbors. Soon their next door neighbor Mr. Vasu (Thilakan), a local businessman moves in. He shifts with his wife, and son Sanju (Rahman). Vasu too doubts his wife. Things get all twisted up when due to some unfortunate happenings both Clara and Vasu suspect their respective partners of having an affair with each other. The children meanwhile become close and start a love story of their own. Both the families reject their children's love interest and restrict them. One day the children go missing and Isaac finds a letter addressed to him by his daughter, Sicily before she left. Where are Sanju and Sicily? What did Sicily write to her father? Will Clara ever be able to understand her husband and realize her own mistakes?