Having just returned from France after World War I with a medal of honor and serious shell shock, Inspector Rutledge struggles to settle back into his duties at Scotland Yard, when an envious supervisor assigns him to a traumatic case.
In 1919, Scotland Yard Inspector Ian Rutledge finds himself the target of a mysterious person who is leaving oddly engraved cartridge casings around that seem to point to unfinished business involving the Great War.