Mildred is a young girl at the prestigious Miss Cackle's Academy for Witches, but unfortunately for her she's not very good at being a witch, in fact you could say she's... The Worst Witch. Along with her two best friends, Maud Moonshine and Enid Nightshade, Mildred must foil benevolent headmistress Miss Cackle's evil sister Agatha from taking over the school before the Grand Wizard (Tim Curry) arrives for Halloween. Family fun especially for the young ones.