While the millionaire Stratford Harlow is in Princetown, not only does he meet with his lawyer Mr Ellenbury but he gets his first glimpse of the beautiful Aileen Rivers, niece of the actor and convicted felon Arthur Ingle. When Aileen is involved in a car accident on the Thames Embankment, the driver is James Carlton of Scotland Yard. Later that evening Carlton gets a call. It is Aileen. She needs help.