The search for a missing artist draws Donald Langham and Ralph Ryland into London's criminal underworld, with deadly consequences. London. April, 1957. Private investigator Donald Langham is approached by retired businessman Vernon Lombard to find his missing son, Christopher. But what appears to be a simple case of a missing artist becomes far more alarming when Langham realizes there's more to Christopher's disappearance than meets the eye, and then makes a terrible discovery. Meanwhile, Langham's business partner Ralph Ryland's search for a missing greyhound forces him to confront a shameful secret from his own past, with terrifying consequences. Can Langham navigate London's criminal underworld, fascism and deception to track down a killer and save Ralph's life?