Prabhu (Dhanush) is a happy-go-lucky middle-class man who spends time playing carrom in the streets with his friends Sathish (Santhanam) and Kumar (Karunas) and others. He and his father (Murali) keep falling into minor misunderstandings, and he indulges in a romance with a girl named Hema (Divya Spandana), who he meets at a bus stop. When he is caught in the act of stealing a pittance from his father for booze with his friends during one of his friends' sister's marriage, Prabhu questions his father’s responsibility towards his upbringing, as a result, his father gives Prabhu some of his savings and tells him to do something with his life. Prabhu purchases a Bajaj Pulsar bike with the money. While his family initially berate him for buying the bike, he soon secures a job at a bank due to his bike, earning their respect. He forms an interminable attachment with his bike since it became his streak of luck, from getting a job to Hema eventually reciprocating his feelings. The bike eventually saves his life from a freak incident and gets lost during an outing with Hema, subjecting Prabhu to unfathomable anguish as he searches for his bike with his friends. When his family members asks him about his bike, he tells them that he had given it for dealer service.