When a mysterious criminal steals a secret state-of-the-art time machine, planning to use it to change past events to destroy America in the present, the only hope is a team of unexpected heroes composed of a scientist, a soldier and a history professor. The trio must use the stolen machine's prototype to journey back in time to critical events, being careful not to affect history themselves, while working to stay one step ahead of the villain who would unravel the timeline and understand the mystery driving his mission before it's too late.