An innocent man becomes embroiled in international espionage as he tries to uncover the meaning behind the cryptic last words of a mystery woman, whom he knew for only a brief time before finding her dying in his flat. He must flee for his life from foreign spies and the police, who think he is a murderer. Spy thriller based on John Buchan's novel, starring Kenneth More, Taina Elg, Barry Jones and James Hayter