As D-Day nears, Hitler approves a desperate scheme to derail the invasion. The Allied Naval Command's headquarters at Dover Castle is vulnerable. Three neophytes at MI5 sniff the plot but London ignores their warnings, unable to admit a flaw in their vaunted Double-cross spy cadre. With time running out, the trio must find a way to stop the Nazis and prevent the Normandy Landings from collapsing in disarray.

A mysterious yacht explosion has killed Rob Brace's wife-revenge for a bloody mission he led decades before, no doubt. As Allied armies closed on Berlin, David Windsor, who had once ruled the British Empire as King Edward VIII, is taken hostage. Brace returns to his boyhood home in the British Virgin Islands, and an old flame, to free the Duke of Windsor from a band of Caribbean rebels. The two of them discover other factions also have an interest in the royal's well-being. Violence continues to dog Brace as he stitches the wartime mission back together in order to avenge the murder of his...