Vishwanath (SP Balasubramanyam) is a multi-millionaire industrialist. Vijay, (Venkatesh) his only son, having grown up in the United States, has no interest in marriage, his goal is to enjoy his youth as much as possible. Vishwanath would like his son to get married and become responsible, his insistence makes Vijay agree to a marriage but with a unique condition — a kind of a test drive! The marriage will be for a single year, initially, and at the end of the year he can choose to continue it, or not, depending on his attitude towards his wife, in that duration, the marriage will be annulled. Radha (Soundarya) is Vishwanath's personal secretary, is a hardworking girl struggling to support her family. Vishwanath asks Radha to quit her job and marry his son, but she refuses when she hears Vijay's strange condition. However, Radha's family is in dire financial straits and, so, she has to reconsider this offer. In return for marrying Vijay, she asks for financial support for her family, which Vishwanath readily provides.