Two groups of Chicago gangs extorted rich people in London, and people were panicked for a while. An old rich man was the target of the robbers. After he was brutally killed, his nephew with a bad reputation thought he could get all his property, but in the end, it was the rich man's female assistant who inherited his inheritance. In order to eliminate the gang threat, Scotland Yard enlisted the help of a capable FBI police officer (played by Christopher Lee), and also joined the police and bandit battle was an eccentric housekeeper (played by Eddie Arendt). The robbery and murder incident intensified, and two police officers were determined to bring them to justice. (Douban Film Subtitle Translation 2.0 Group)