Roger West of Scotland Yard has a boss who simply does not like his methods. He must therefore attempt to be more conventional when faced with a case involving an attractive girl who is brutally killed. She had a bad reputation, but that just makes the task all the harder. The chief suspect proves to be innocent and the plot deepens as blackmail and forgery enter the fray. West therefore has to act and quickly, but now doing things his way. He is cold and calculating, but gets results.