Rahul Kapoor (Imran Khan), 25, is on his way to become a carbon copy of his parents when he suddenly loses his job as an architect in Vegas. Afraid that he has let his parents down, Rahul decides to hide the truth and find another job. When by a twist of fate, he meets Riana Braganza (Kareena Kapoor), 26, a quick-witted hairstylist, who is everything he isn't.
A series of events lead them to meet on Christmas Eve over a few drinks… but like always, it's never a 'few'. Following this night of debauchery, they wake up to discover that they've gotten married. Now, Rahul has more than just his job loss to hide from his parents.
They both decide to get it annulled as soon as possible and get an appointment from the court in ten days. Over the next ten days they have their share of arguments, moments and laughs that results in an unlikely friendship.
Will this friendship turn in love? Will her warmth and fearlessness give Rahul the courage to face a long-simmering confrontation with his parents? Will a marriage that started as a drunken mistake help two people find themselves?