London, June 1940. When the body of silent screen star Mabel Morgan is found impaled on a wrought-iron fence, the coroner rules her death as suicide. Detective Ted Stratton is not convinced and suspects that Morgan's fatal fall may have been the work of one of Soho's most notorious gangsters. Meanwhile, MI5 agent Diana Calthrop is leading a covert operation when she discovers that her boss is involved in espionage. Only when Stratton's path crosses...