On fastest fat burner

There's another Bollywood movie I saw recently that isn't typical, but interesting though very sad. A young English woman discovers her grandfather's diary - he was a police officer in India in charge of jail where Indian fighters to stop colonialization were housed and eventually executed. She wants to make a movie about this story -- she's fascinated by the revolutionaries -- and goes to India and finds a friend to help her. She's part of a group of friends who get drafted against their wills, because they are modern and don't relate to the revolutionaries willing to give their lives. They make fun of the whole idea, because India is now so poor and corrupt. Yet in the end the roles they play in the movie start to affect their lives, and they go up against the government's corruption. They go from being modern guys looking for the fastest fat burner and drinking and partying and not caring about anything except themselves and their friends, to battling like the revolutionaries of old.