Nandini and Navin decide to get married. So Navin and his friends, an overweight Sudeep and Yash go out to celebrate. But they are hardly able to celebrate, as they meet with an accident which leads to Navin's death.
Navin is transferred to heaven and to his horror, he discovers that his death was a mistake and the man who was actually supposed to die, in the accident was Sudeep with his cholesterol on overdrive. This makes Naveen very angry and he demands to be returned back to earth as early as possible.
When Navin returns to earth he has to impress Nandini all over again in another guise. Will he be able to woo Nandini?
Fatso is a different and delightful take on love, life and accidental death.