A voice-over by RD (Anil Kapoor) introduces the four main characters: Ranvir Singh (Saif Ali Khan) runs a successful business he inherited from his father. His younger brother Rajiv Singh (Akshaye Khanna) mooches off of Ranvir and is an alcoholic. Ranvir is dating an upcoming model Sonia (Bipasha Basu), while his personal assistant Sophia (Katrina Kaif) appears to be secretly in love with him. Ranvir is also involved in an intense competition with a rival horse-owner Kabir (Dilip Tahil). The film opens with a murder plot involving a car accident which Ranvir narrowly survives. When Ranvir loses money in a race because his jockey had been bribed by Kabir, Ranvir plants a bomb in the jockey's car and kills him, showing Ranvir to be a ruthless businessman. In a drunken stupor, Rajiv confesses to Ranvir that he likes Sonia and that he would quit drinking if he could spend his life with a girl like her. Ranvir immediately stops dating Sonia so that Rajiv can have her. Rajiv and Sonia begin dating and appear happy, until in a twist, Rajiv reveals he knows of Sonia's shady past and suspicious motives. Rajiv reveals that his father had secured identical life-insurance policies for huge sums on each of the sons.

He explains that he wants to kill Ranvir in what would appear to be an accident and inherit $100 million dollars in insurance payments and wants Sonia to play along. Sonia agrees to help in exchange for $20 million. They pretend to get married and Rajiv ignores Sonia in this fake-marriage while continuing to play an alcoholic. As per his instructions, Sonia seduces Ranvir who confesses he loved her all along. Rajiv reveals the rest of his plan: to threaten to commit suicide in response to Sonia and Ranvir's affair by leaping off a tall building, have Ranvir appear on the terrace, and get Sonia to push Ranvir off. However, in a new twist, it turns out Ranvir was aware of the plan all along as Sonia, who had apparently fallen in love with Ranvir, had been keeping him updated.