A US Army pilot wakes up on a commuter train but finds he has taken on a new identity. When the train explodes 8 minutes later, he is placed in a pod where he learns he is part of a government program that sends him back in time to prevent the bombing. He fails on two attempts. The film uses conventions like a ticking clock deadline but also subverts conventions by having a strong female character inform the protagonist he is in the past. Reviews praise its thrilling nature but note plot holes in the science.