As a girl named Harumi ends up sneaking into their school with her friends, she soon finds the faces of her friends have mysteriously vanished. When Harumi nearly drowns in a pool while trying to escape, she is rescued by a kappa named Kappaeru, who takes her to an underground base where she meets also meets the ice princess Yukiko and the fiery mage, Enma, who together form the Yōkai patrol, a group sent from hell to stop demons that appear on the surface. Determining the culprit is a face-eating demon, Harumi offers to lure out the demon so that Enma and co can attack it. Although Harumi finds the beast, due to Enma's laziness her face is also stolen by the time they arrive. Enma ensues in battle with the demon and, despite showing no disregard to the innocent faces while smashing it with his fiery hammer, manages to kill the demon and return all the faces to their rightful bodies.
