During 1996 Raj Sharma (Ranbir Kapoor), while in Switzerland, meets with Amritsar-based Mahi Pasricha (Minnisha Lamba), successfully woos, and then dumps her. Then during 2002, he meets with an aspiring model, Radhika (Bipasha Basu), who is also attracted to him, and both move-in to live together in a small apartment in Mumbai. When he gets the opportunity to settle in Sydney, Australia, he dumps her and re-locates there. Now it is 2006, and Raj has met a brilliant taxi-driver, Gayatri (Deepika Padukone), who he falls in love with. The question remains, will his attraction again be temporary? And what will be the consequences if Gayatri finds out about his past?