An investigator seeking the cause of an airline disaster discovers the involvement of an organisation of time travellers from a future Earth irreparably polluted who seek to rejuvenate the human race from those about to die in the past. Based on a novel by John Varley.

Satan's School for Girls is set within the grim walls of Fallbridge College for Girls. Hoping to learn the truth behind the "suicide" of her younger sister, Beth Hammersmith enrolls in Fallbridge under the assumed name of Karen Oxford. Our heroine soon learns that the school is in the clutches of a coven of witches called "The Five" — and that she herself has the right satanic qualities to enable The Five to take over the world.