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.

In this continuation to the adventure of the demon superhero, an evil elf breaks an ancient pact between humans and creatures, as he declares war against humanity. He is on a mission to release The Golden Army, a deadly group of fighting machines that can destroy the human race. As Hell on Earth is ready to erupt, Hellboy (Ron Perlman) and his crew set out to defeat the evil Prince before The Golden Army can destroy humanity's existence.

Based on the graphic novels by Mike Mignola, Hellboy, caught between the worlds of the supernatural and human, battles an ancient sorceress bent on revenge.