Miss Cackle's Academy is no ordinary school. It stands at the top of a high mountain surrounded by a pine forest, and one clear days you can just see the pupils flitting about on their broomsticks above the playground wall. For this is a school for witches and, instead of the usual lessons, the girls there all have to learn about such things as casting spells and making magic potions.
Mildred Hubble has a reputation for being the worst pupil in the school - she's always getting her spells wrong. But she manages to get by until she turns Ethel, the teacher's pet, into her deadly enemy . . .