Time traveling androids created to entertain audiences in the future go back to 1996 as part of their game, and wreak havoc on Mexico City.

A series of inexplicable murders occur at a space research center. The only survivor is a doctor who claims to remember nothing. A group of men discover that "The Beast" has returned, and that it is an emissary from another planet, with strength superior to that of humans. Will they be able to destroy it in time?