Agastya Rao (Akshay Kumar), is an astronaut with NASA, and when he finds out that his college sweetheart Piya (Preity Zinta) is about to divorce her husband, decides to try his hand at wooing her. He gets the voluntary help of one-time Bollywood wonder Suhaan Kapoor (Salman Khan), who accompanies Agastya to New York and assists him in successfully wooing Piya. On the night of their engagement, Agastya finds out that Suhaan only wanted to help him because of Section 25 of the Hindu Marriage Act - so that could relieve him of the financial burden of paying alimony to Piya, who was the girl he had secretly married much against the wishes of the entire family. Watch what happens when Suhaan finds out that he has a daughter named Suhaani - and that he still has strong feelings about Piya.