Shiva, the main hero played by newcomer Sethu, enters as a police officer with the name tag reading R. Alexpandian. This is intended to be a spoof to the movie Alex Pandian, which released two days earlier and also included Santhanam as part of the cast.
Shiva (Sethu), Kaalkattu Kaliyaperumal (Santhanam), and Power Kumar (Srinivasan) are three friends with no occupation other than getting drunk and chasing girls. A pretty girl named Sowmiya (Vishaka) moves in with her family to the house opposite Shiva. The three friends fall for the girl’s beauty and make a gentlemen’s agreement to let the girl choose her boyfriend. The three attempt different methods to woo her. Shiva helps Sowmiya’s aunt (Kovai Sarala) in household work; Kaliyaperumal joins Sowmiya’s uncle (Ganesh) to learn singing; Power joins Sowmiya’s father (K. Sivasankar) to learn Bharatanatyam. One day, when none of her other family members are home, the three eventually profess their love, leaving Sowmiya confused.

Jai and Neha, eloping to Hyderabad to get married, offer lift to a stranger on the highway not realizing that he is a murderous psychopath.

The film begins with Karthik (Sethu) meeting psychiatrist Valeba Raja (Santhanam) to discuss about his life story. Apparently Karthik has two love stories. He falls in love with Sweety (Nushrath Bharucha) on first sight but when she bashes a guy for wrongly interpreting her friendship as love, our hero decides to put ‘Project Sweety’ on hold. Meanwhile, Karthik’s family plans to marry him to Shalu (Vishaka Singh) but the former tells about his so-called love story to the latter and she offers to help him out by telling her parents they need fifteen days to take a firm decision on wedding. During the process, Shalu and Karthik develop a liking for each other but suddenly Sweety too reciprocates his love to our hero. The rest of the story is all about whether Karthik marries Shalu or not.