Disaster-prone Mildred Hubble finds that despite her best efforts she still manages to get into trouble at Miss Cackle's Academy for Witches, especially after she is put in charge of the new girl, the seemingly placid Enid Nightshade.

Resolving to stay out of trouble when she is assigned the important task of lighting lanterns and candelabras every evening, Mildred Hubble finds her efforts challenged by the arrival of an exuberant stray puppy who loves to fly on broomsticks.

When Mr. Large the elephant tells his ill wife he will take care of the family while she rests in bed, she finds it difficult to relax with all the commotion in the house.