Hellboy, a demon and paranormal investigator, forms a team to stop the Elf Prince from awakening an invincible army that can destroy humanity. Along the way, Hellboy faces personal conflicts and discovers secrets about his origins.

Hellboy, a demon rescued from the Nazis, grows up to become a defender against the forces of darkness. When his adoptive father is killed and his friends are captured by a resurrected Rasputin, Hellboy must embrace his true identity and make a choice between good and evil.