Stretching from London to Scotland and a hermit island, JHC opts for non-stop action and very little psychologizing in this thriller. Caught up among three former fighters in the French Resistance, Martin Corridon finds himself in their pay searching for a fourth member, Mallory, who has supposedly betrayed them to the Gestapo during World War II. After that, it's all run, fight, flinch, kill, wound, and obsesses over revenge.
In this instance, JHC was moving away from his more psychologically involved London-based thrillers, which underwent quite a degree of character development and analysis. Here, the veneer of personalities never cracks. You never really appreciate what motivates Corridon, other than opportunism and an occasional misplaced bit of altruistic commitments to the hare-lip, Effie. Most of the time, however, he is a rogue, a conman, a chiseler who, but who still does the right thing in the end. A clear move away from earlier characters who exhibited more than a touch of moral ambiguity and self-doubt.