A blood-covered woman is found wandering at night with no memory of what happened. Under interrogation, her fragmented story reveals visions and encounters where reality merges with the monstrous.

A boy and a girl, bound in their past, cannot live in the present.

Years after an alien invasion, three heroes decide to time travel to save the survivors but they don't know that the Sentinel is waiting for them.

An asteroid shower hits a space station, then lands in a remote section of the Grand Canyon. Mysterious pods form and soon mutate into creatures that threaten the space station and Earth.