Lovable but accident-prone Mildred Hubble is possibly the worst witch ever to go to Miss Cackle's Academy for Witches. She always tries her best, but her spells never seem to go right. In her latest adventure, Mildred is set up for disaster by her arch nemesis, Ethel Hallow. Ethel steals Mildred's summer project and her enchanted tortoise, Einstein, and Mildred must brave a broomstick flight through a violent thunderstorm to rescue him. But will she ever get back into Miss Hardbroom's good graces?