A Boston police detective investigates a series of gruesome decapitations of various college coeds, committed by a helmeted, black-leather clad serial killer.

Two Christmases have passed and widow Kate Thornton has taken over Thornton Industries and is wooed by a courtly financier.

A young female doctor discovers something sinister going on in her hospital. Relatively healthy patients are having 'complications' during simple operations and ending up in comas. The patients are then shipped off to an institute that looks after them. The young doctor suspects there is more to this than meets the eye.