John Drake travels to the Scottish Highlands when the fingerprints of a stolen car belong to a master spy believed to have been killed ten years earlier.

Drake travels to Hong Kong to investigate the murder of a sound technician working for a radio station. He uncovers a plot where the secret information is being sent out in code over the air, transmitted as part of the station's English lessons.

John Drake must follow an avenging agent, bent on murderous revenge.