Decorated soldier Captain Colter Stevens wakes up in the body of an unknown man, discovering that he is involved in a mission to find the bomber of a Chicago commuter train. He learns he is part of a top-secret experimental program that enables him to experience the final 8 minutes of another person's life. Colter re-lives the train incident over and over again, gathering more clues each time. But can he discover who is responsible for the attack before the next one happens?