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Kishen (Anil Kapoor) has a suspicious-minded wife, Kaajal (Lara Dutta), who thinks he is always having an affair with another woman, even though he is extremely faithful to her and wouldnt dream of betraying her in any way. Prem (Salman Khan) has the opposite situation. He is married to Pooja (Esha Deol), who seems to be very trusting, even though he has been having several affairs with numerous gorgeous women. There is also Kishens friend Shekhar (Fardeen Khan), who accidentally falls in love with Sanjana (Celina Jaitley) and marries her. Then Bobby (Bipasha Basu), a call girl, enters the story.

When Kishen takes pictures of Prem and his girlfriend, and threatens to send them to his wife, Prem hires Bobby to seduce Kishen. The plan is that Kishen will fall in love with her, and Prem wants to see if Kishen can hide the relationship. Then the lies start happening, as Kaajal thinks Bobby is Shekhars wife, and Sanjana thinks Bobby is Kishens wife. It becomes a bundle of confusion and comedy when all the various people and couples start meeting.