A pool-hall is used as the front for a white slavery ring.

A man is found dead in a London hotel. The knife is still stuck in the victim's chest, and Inspector Perkins strangely finds a glass eye in his jacket pocket. Shortly afterwards, a second mysterious murder occurs: a well-known dancer of the Las Vegas Girls, who perform in London's Odeon Theater, is poisoned. Is there a connection between the pretty dancer and the hotel guest? Inspector Perkins and his colleagues are pressed for time. The "man with the glass eye" strikes fatally again and again.—Canon y mus