Mildred Hubble is determined that her third year at Miss Cackle’s Academy for Witches will be her best. And when the horrible Miss Hardbroom is replaced by a new teacher, things finally seem to be going Mildred’s way. But the new teacher is very strange. . . .

Mildred Hubble is sure that the new term at Miss Cackle's Academy for Witches is going to go brilliantly. She has prepared the best Holiday Project ever - she's certain that her form teacher, the formidable Miss Hardbroom, will be impressed. Even Mildred's arch-enemy, Ethel Hallow, is being friendly! But is it all just too good to be true?