A demon, raised from infancy after being conjured by and rescued from the Nazis, grows up to become a defender against the forces of darkness.

Developers searching for a location to build a new resort are trapped in a subterranean WWII bunker, where they are confronted by an ancient evil.

A prince of the mythical world starts a rebellion against humanity in order to rule the Earth. Hellboy and his team must fight to stop him from locating the all-powerful Golden Army.