Tim Diamond, the world's most incompetent private detective, lives in a flat above his office in
Camden Town with his teenage brother Nick. One day, a mysterious client, by the name of Jake McGuffin, enters their office, and explains that he is an
MI6 agent, working with the Dutch secret service to stop a
contract-killer called
Charon from murdering a Russian diplomat and re-starting
The Cold War. He claims that he's being chased by two henchmen and needs to make a call. Since their phone had been cut off, he offers Tim fifty pounds for his overcoat so that he can make it to a telephone box without being seen. Later on, Nick, the sharper of the two brothers, spots that McGuffin had left his hotel room key on the desk. The two brothers rush down the alley to the telephone box and find McGuffin has been shot. As a loud train passes on the flyover, McGuffin mutters his final words to Tim. Their investigation into Charon leads them wanted by the police for armed bank robbery, handcuffed and held at gunpoint by a
guesthouse owner, machine-gunned by a bi-plane in a cornfield, chased by two armed henchmen and being hunted by the world's deadliest assassin. ==Production==