On the darkest moon of Mars, scientists have found an ancient portal which allows teleportation throughout the universe. Considered to be mankind's greatest discovery, it's actually a gateway from hell, unleashing a swarm of demons looking to steal the souls of everyone who gets in their way. It's up to Lieutenant Joan Dark and an elite unit of Marines to destroy an every-growing horde of bloodsucking and soul-stealing beasts and to prevent them from taking over planet earth.