Escaping from a stor, Rick and Jennifer seek refuge in a mansion. The two are attacked by demonic creatures that drag Jennifer into the house and fatally wound Rick, leaving him for dead.
Rick awakens in the dungeon of the mansion to discover that he is still alive thanks to the influence of the "Terror Mask," a Mayan sacrificial artifact from West's house which is capable of sentient thought. The mask attaches itself to Rick, fusing with his body and transforming him into a monster with superhuman strength. With the mask's encouragement, Rick goes on a rampage through the dungeon and the mansion grounds, killing hordes of monsters.