When Derek Willow is invited to visit a friend in the old neighborhood, he and his siblings Abner, Tate, and Celia try to earn money for his train ticket using an enchanted, and very hungry, lawnmower.
When the Willows move into a new house, Celia, the youngest of four children, traps an enchanted hamster, who reluctantly agrees to grant the children one wish in exchange for his freedom.