In 1944 during World War II, Grigori Rasputin, his disciples Ilsa von Haupstein and Obersturmbannführer Karl Ruprecht Kroenen, and a group of Nazis build a dimensional portal to free demonic entities called Ogdru Jahad to help them win the war. However, young scientist Trevor "Broom" Bruttenholm and an Allied strike force interrupt them and destroy the portal, which pulls in Rasputin while Haupstein and Kroenen escape. The Allied team soon discovers an infant demon with a stony right hand had come through the portal and dub him "Hellboy", who Broom adopts as his son.
