A pretty girl and a drunken producer are involved in a dramatic motor accident on the road from Lyons to Paris – a fruitful source for blackmail. The first sinister consequence occurs at a party where, among the actresses and producers, Dr. Morelle is present with his secretary. Miss Frayle. The famous criminologist finds himself plunged into one of the strangest cases of his career as he takes to the airwaves to unmask a murderer before he can kill again! A classic British mystery by the BBC's «Armchair Detective.»
