Key of Life (2012)

A failed and depressed actor meets a stranger with a wad of cash at a bath house when the strange slips and become unresponsive the actor quickly switches identities with the stranger. The strange lives the actor's life by trying to bring order and structure for positive change and remembering his past. The actor frivolously spends the stranger's money only to later know the stranger was an elite assassin. Both of them carry out their assumed life and gets into troubles.