In a forest, a group of white mice commission a doll from the Creatures Who Dwell Under The Oak. But the Creatures grow attached to the completed product and refuse to sell it to the mice. Finding an egg nearby, the Creatures sew it into the doll's belly. After the angry mice return and steal her back, the Creatures set out to rescue their beloved object, encountering a number of obstacles on their way -- from labyrinths to poisonous fruit and a sinister spider-woman.