Here he reprises the story of Hellboy (also directed by him) and he opens his box of tricks to make a very enjoyable fantasy story. If you don't like action movies based on comic strips (and thus with a weak or shallow story) you should not even bother going to watch this movie. Everything you see on the screen is done with so much tongue-in-cheek and irony that you need to be huge cynic not to appreciate the fun this movie spreads around.
Professor Trevor 'Broom' Bruttenholm: It is said that at the dawn of time, man, beast, and all magical beings lived under Aeglin, the Father Tree. But man had been created with a hole in his heart, a hole that no power, riches, or knowledge could fill. And in his infinite greed, man dreamed of expanding his dominion over the entire earth. The blood of many an elf, ogre, and goblin was spilled in their bloody war with man, and King Balor, the one-armed king of Elfland, watched in sorrow. But then one day, the master of the goblin blacksmiths offered to build for the king a golden mechanical army, seventy times seventy soldiers, that would never know hunger, and could not be stopped. Prince Nuada begged his father to agree. "Build me this army." And a magical crown was forged that would allow those of royal blood to command the Golden Army. "I am King Balor, leader of the Golden Army. Is there anyone here who disputes my right?" And in his throne room, no one challenged him.
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 and his crew set out to defeat the evil prince before The Golden Army can destroy humanity's existence.