This Hammer Production set in the English countryside pits Gwen Mayfield (Joan Fontaine), the newly appointed headmistress of Haddaby Academy against a coven of witches. Tormented by memories of experiences with African witch doctors, Gwen thinks that working at a quiet English countryside school will help her resume a normal life. But when a little boy becomes comatose and Gwen discovers a suspicious voodoo doll, she realizes that she must undertake a witch hunt before the evildoers can destroy the town.