Three wealthy trustees of the Van Traylen fund, which supports a school for orphans on the Scottish island of Bala, are murdered, though their deaths are staged as suicide or accident. Three other trustees are on a bus carrying children from the school when the driver suddenly catches on fire, but he is the only one to die. One of the girls on the bus, Mary Valley (Gwyneth Strong), is taken to a London hospital, where she has strange seizures. A young psychiatrist (Keith Barron) and a tabloid journalist (Georgia Brown) interview the girl's mother (Diana Dors), hoping to enlist the aid of the hospital's senior member, Sir Mark Ashley (Peter Cushing).
Directed by Peter Sasdy
Screenplay by Brian Hayles
Classic British Horror Films