Petronella Applesauce lives in the garden of an old mill. Here, she has made herself quite comfortable in an apple. She also loves to fly around the area on the back of stag beetle Lucius. But one day, the Kuchenbrand family moves into the house with their two children - and the peace is over! Although Petronella tries to scare off the new tenants with all sorts of witchcraft, nothing works. Fortunately, Petronella soon realizes that the new neighbors are actually quite nice...