An evil elf breaks an ancient pact between humans and creatures, and 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 and his crew set out to defeat prince and his army.
Sinister Mr. Zinco locates the remains of undead nazi assassin Kroenen from the first movie, as well as a lost Nazi base at Antarctica. However, he's tricked by Rasputin.
Short motion-comic prologue to Hellboy II: The Golden Army. In 1955, Hellboy's caretaker, professor Broom, tells young Hellboy the tale of an indestructible mechanical army created to end the war between humans and magical races.