Hellboy: Sword of Storms is an animated film based on the popular comic book series by Mike Mignola, focusing on Hellboy, a demonic creature summoned to Earth during World War II. In this film, Hellboy embarks on a supernatural adventure to Japan, where he must thwart the plans of two demonic brothers who seek to unleash a horde of mythical monsters. The film blends elements of folklore, action, and dark humor, staying true to the tone of the original comics.