The plot revolves around the life in a typical, Malayali household - consisting of four brothers; Nandakumar - A Hindi teacher in the local school, Gopakumar - A medical representative, Krishnakumar - A court office clerk and Chandrakumar - a college student (also the youngest), in order of their age. The first three brothers are married to - Kausalya, Indumati, Anandam; 3 naive, and shallow wives who adore their husbands dearly and whom the husbands equally love. The family is headed by their father, Munshi Parameshwaran Pillai, a veteran Gandhian teacher respected by everyone in their village, who also home schools his grandchildren. The youngest brother Chandrakumar is in love with his to-be engaged fiancée, Asha, his cousin. Their relationship is oppressed by the family members because of a small feud between them. But otherwise, the household is a happy, peaceful and satisfied one until the arrival of their new neighbor - an irresistibly charming and beautiful South Indian film heroine - Yamuna Rani. This turns the household upside down and sends the ladies into a frenzy. The ladies, in order to please the superstar, glamourise themselves, their husbands and the house. Thus, they form a formidable friendship with Yamuna Rani. Soon, trouble starts to brew when the loan with which they bought their new household items in order to impress Yamuna Rani needs to be paid back to the moneylender. The trouble further escalates when the ladies, each, receive a letter from an anonymous identity, which claims that one of the three men are having an extramarital affair with Yamuna Rani.