Madhav Shastry (R Madhavan) a brash college student is constantly at loggerheads with his senior Sam (Saif Ali Khan) who is popular in the college.
Madhav graduates from college and joins a software firm while Sam goes off to America. Madhav falls in love with Reena Malhotra (Diya Mirza) but learns that her parents have fixed her marriage to Rajiv, a guy living in America. He has a week to make her fall in love with him.
He masquerades as Rajiv and sets out to win her heart. And just as she confesses her love to him, her fiance turns up...