At a prominent club in Washington, D.C., a socialite argues about whether it would be possible to change history by traveling back in time. When he leaves the club he finds himself in 1865, on the night that President Lincoln will be shot.
After successfully stealing a gold shipment, a group of criminals and their scientist accomplice put themselves in suspended animation in a remote desert cave. When they awaken decades later, complications ensue when their truck is destroyed.
Adam Grant is trapped in a recurring nightmare, in which he is sentenced to death by execution. He tries to convince the people around him that they are imaginary and that they will cease to exist if the execution is carried out.
A suburban dinner party is interrupted by a bulletin warning of an impending nuclear attack. As the neighbors scramble to prepare themselves, they turn against the one family that installed a permanent bomb shelter.
An army major awakens in a small room with no idea of who he is or how he got there. He finds four other people in the same room, and they all begin to question how they each arrived there, and more importantly, how to escape.