Got a problem? At Vulcan's Celestial Supply Shop, you can find the magical merchandise to set things right. The seasoned staff - a kid named Nico Bravo, a sphynx named Lula, and a unicorn named Buck - pride themselves on providing “legendary service and expertise in all areas of the arcane.” But Nico's world is about to be turned upside down, and it's all thanks his latest customer: Eowulf, the pint-size descendant of the monster slayer Beowulf. Determined to carry on the family business, this would-be warrior plans to slay Cerberus, the terrifying, three-headed hound of Hades. There's just one problem - Cerberus is the only thing preventing the hordes of the Underworld from entering the land of the living. Can Nico stop Eowulf from unleashing a zombie apocalypse?