A slick young man buys a jewel with a cheque that bounces. He then disappears and both the police and a lawyer try to find him. The lawyer hires a female detective to track down the missing man, but when his body is found in the Thames the case is by no means over.
Professional killer Kersten arrives in England and is hired by Donald Edwards to murder his wife Helene. But Helene's lover Robert Vaughan discovers the plot and he trails Kersten and Edwards to a country cottage.
