Deven Yuvvraaj (Salman Khan) is a struggling singer who Dr. Banton (Boman Irani), his girlfriend Anushka’s (Katrina Kaif) father, dislikes because he is not wealthy and is rather careless at times. He signs an agreement to become a billionaire in 40 days. To acquire this wealth, he has to go through an emotional roller coaster journey of joy and pain with his two estranged brothers, Gyanesh Yuvvraaj (Anil Kapoor) and Danny Yuvvraaj (Zayed Khan), who he meets after 12 years. On meeting them, he is shocked to see that his father has left everything to the mentally-challenged Gyanesh. So both Danny and Deven make an agreement to scam their brother out of his money. Danny's attempt to blackmail Gyanesh to make him lie in front of some lawyers fails and he assaults Gyanesh. Deven intervenes and plays the good guy and helps Gyanesh and takes him to Austria in an attempt to win him. There Anushka and Gyanesh get on very well and she is amazed by his singing talent. She lets him into her orchestra which is due to perform in front of thousands of people. Deven gets jealous as Anushka and Gyanesh get on so well but soon learns to love his brother.