At the end of World War II, Nazi officers Karl Ruprecht Kroenen and Ilsa Haupstein start an experiment to raise the forces of hell trough Russian dark mystic Rasputin on a Scottish island, but it's interrupted by an allied commando guided by professor Trevor "Broom" Bruttenholm. He prevents killing the human-demonic half-blood which was accidentally created and raises this 'Hellboy', while rising to head of a secret CIA-linked US agency Bureau of Paranormal Research, which secret studies and uses the to the occult, including supernatural freaks. As 'father' Broom is aging, he hand-picks brilliant, sensitive agent John Myers as new minder-companion, as regular 'warrior' agent Clay can't empathize and lacks flexibility mental. Hellboy is quite a handful, regularly spotted by worried civilians on unauthorized excursions, especially to pyro-telekinetic freak friend Liz in a mental asylum. Johnny, Hellboy and Clay team up on missions against paranormal threats with aquatic-bionic freak Abe Sapien. Their ask proves daunting, as monster Sammael multiplies every time it 'dies', while both Rasputin and the Nazis reemerge, armed for revenge.
