With the German surrender just days away, Hastings prepares for celebration. Changes — not to mention a few surprises — are in store for everyone. But first, there's one final case to solve. The murder of a local committee member puts Foyle at odds with his old friend, the American Captain John Kieffer, on whom the war has taken a terrible toll. As the investigation deepens, Foyle finds himself peering into one of the darkest corners of the war effort to uncover a devastating secret the Allies would rather keep hidden.