 On a chance encounter Raj Malhotra (Bobby Deol) meets with Priya (Kareena Kapoor). Priya s dad (Dalip Tahil) knows of the Malhotra family, and soon Raj and Priya fall in love with each other, and are married. They decide to settle in Switzerland. Their neighbors are another Indian couple, Vikram alias Vicky Bajaj (Akshaye Kumar) and Sonia Bajaj (Bipashu Basu). They come to know each other, and become friends. They holiday in Mauritius. It is here that Vicky asks Raj to swap wives for a night. This angers Raj and they get into a fight. Back home, things cool down a little bit, and both couples decide to start afresh. On Vicky s birthday, both men get drunk, and end up in each other s homes. Raj wakes up with a dead woman next to him. Subsequently, he is arrested by the Swiss police. His friend Vicky has turned against him; his wife no longer believes him; and it is upto Raj himself to prove his innocence. So he escapes dramatically from the courtroom, and sets out to find evidence that will prove his innocence.