An Australian police detective is sent to arrest a diplomat suspected of murdering his first wife. He is persuaded to wait until after the suspect has completed a series of vitally important negotiations, only to end up having to protect his would-be prisoner from an assassination plot. Spy thriller, starring Rod Taylor, Christopher Plummer and Lilli Palmer.

Detective Scobie Malone accepts a mission to fly to London to arrest Sir James Quentin, a high-level commissioner wanted down under for murder. But when Malone arrives, he finds that the amiable Quentin is not only the key in groundbreaking peace negotiations, but also the target of an assassin himself.