Back on duty in France, Bess is shocked to discover the wife’s photograph in a newspaper accompanying a plea from Scotland Yard for information about her murder, which took place on the very day Bess witnessed that anguished farewell. Granted leave to speak with the authorities, Bess very quickly finds herself entangled in a case of secrets and deadly betrayal in which another life hangs in the balance, and her search for the truth could expose her to far graver dangers than those she faces on the battlefield.