London, June 1940. When the body of silent screen star Mabel Morgan is found impaled on railings, the coroner rules her death as suicide, but DI Ted Stratton of CID is not convinced. As he starts asking questions, it becomes clear that Morgan’s fatal fall may have been the work of one of Soho’s most notorious gangsters. When Stratton’s path crosses with MI5 agent Diana Calthrop, they uncover a criminal network and a secretive pro-Fascist organisation. It soon becomes clear that the intrigues of the Secret Service are alarmingly similar to the machinations of war-torn London’s underworld.