Henry Christie thought he'd solved the case that drew him out of retirement, but finds himself joining forces with Diane Daniels once again when the body of a young woman is discovered close to the scene of the chilling murders that took place at Hawkshead Farm. The deaths appear to be linked, and when Henry and Diane stumble upon an execution in progress and narrowly avoid becoming victims themselves, Henry embarks on a mission to bring a merciless gunman to justice, as well as a very personal quest for revenge.