When airman Captain Colter Stevens wakes up in someone else's body, he discovers he's part of a mission to find the bomber of a Chicago commuter train. A program designed by the government called Source Code enables him to cross over into another man's identity in the last 8 minutes of his life. With a second much larger target threatening to kill millions looming, Colter re-lives the incident over and over until he can solve the mystery of who is behind the bombs and prevent the next attack.
