The story starts off with Raghu (Raghuvaran), a passport-issuing officer, and his wife Shanthi (Shanthi Krishna), who live in Chennai. Raghu, being an honest man, tells Shanthi that he cheated on her with a coworker when he was in Goa. She immediately leaves for her mother's house. Raghu, being a transformed gentleman, tries to stop her by apologizing, but in vain. Raghu's brother Vijay (Vijay (actor)), being a good and supportive brother, and Shanthi's brother Suriya (Suriya), being a non-emotive but supporting brother, meet in a cinema theater. Vijay, being a righteous brother, blames Shanthi to be the cause of the problem, and Suriya blames Raghu for the same. They keep on fighting at every chance. Meanwhile, both Vijay and Suriya find their own girlfriends and fall in love. One day, Raghu finds a bundle of cash on his table and meets Muthukumaraswamy (Karan (actor)), the person who kept the money there. Raghu finds out that Muthukumaraswamy is an Member of Legislative Assembly who is wanted by the police. Muthukumaraswamy wants to leave the country to escape from the police, and he needs a fake passport to flee the country; otherwise, the police will catch him. Since his passport is confiscated by the police, he tells Raghu to get one for him, but Raghu, being a sincere officer, disagrees and calls the police instead. Muthukumaraswamy gets angry and promises to avenge Raghu. Meanwhile, Raghu and Shanthi apply for a divorce according to the The Hindu Marriage Act, 1955.