London, 1940: When the body of a silent film star is found impaled on railings, DI Ted Stratton is unconvinced by the suicide verdict. Ignoring orders to close the case, he investigates and soon finds himself deep in Soho’s criminal underworld. Meanwhile, elegant and beautiful MI5 agent Diana Calthrop is working on a covert operation to infiltrate a pro-Nazi group with links to senior establishment figures, but questioning her boss’s loyalties may not be a smart move… When their paths cross, Stratton and Diana start to uncover the truth. But fighting these enemies – within and without – could lead to more than they bargained for..