Killed too soon due to a clerical error in heaven, a man is sent back to earth with a new lease on life, this time in the body of his portly friend.

They say that matches are made in heaven. This is one of those films where they are undone in heaven! But then again, that's the strange thing about love: just when the worst has happened, the best happens almost like the nightmare never took place, almost like love is undeniable, almost like love and hope are two faces of the same coin. Nandini (Gul Panag) fell in love once and then life happened--shattering every belief that she had about love. And then, just as she was ready to give up on love, she fell in love, all over again! Hysterical, intelligent, honest, Fatso is all about love packaged in with a calorie count!—Everymedia

Navin Yash,Nandini,Tanuja and Sudeep (Fatso) are five friends ,Yash is dating Tanuja and Navin has recently proposed Nandini for marriage ,the group is having a quality time with each other.Navin,Yash and Sudeep are traveling in a car which meets with an accident killing Navin he is taken to heaven by an angel Vijay where he realizes the goof up that Vijay has picked up the wrong soul it was Sudeep who was suppose to die.Navin creates a havoc in heaven demanding he be sent back to earth as it was their mistake but on earth his soul has already been cremated,Vijay transfers Navin's soul into Sudeep's body where he will have to live life of Sudeep on earth with soul of Navin.—[email protected]