Army Captain Colter Stevens (Jake Gyllenhaal) is confused upon waking up in the body of a man named Sean Fentress on a Chicago commuter train. He soon finds out, though, that he is part of an experimental government project, named Beleaguered Castle. In the mission, Stevens must assume the identity of Fentress and find the perpetrator who planted a bomb that is set to go off on the train in 8 minutes. Time travel and alternate realties are both themes of the film, which are also present in Inception. Source Code is a wild ride that will get your heart racing.