It’s Spring 1943 and an Axis victory seems inevitable. The Allies one hope – production of newly developed sonar equipment – is moved to Victory Munitions. Gladys Witham, a fiery young woman from privilege, is covertly recruited by Allied Intelligence to find a saboteur on the new line. But she must spy on her friends, co–workers and fellow agents, calling into question everything she has come to trust. Sworn to secrecy, how can she reach out to her friends for help? And without them, how will she find the traitor?