A mysterious voiuce beckons Narimiya Wataru, a lonely sixth grader, luring him into the mountains outside his rural Japanese village. There, Wataru meets a strange new friend, "Peke," a bizarrely cute creature with cross stiches over its mouth. Wataru soon learns that there is a hidden world of monsters that partner with young children, and together, they enter horrifying death matches. Watch what really happens when kids with no conscience get hold of cuddly little killers to do their bidding.