1938. As Hitler sets his sights on the Sudetenland, not everyone in Britain is willing to appease him. Convinced that the Fuehrer's land-hunger is insatiable, the head of the SIS recruits Cal Jardine to help him prove Czechoslovakia is threatened with invasion. Before heading undercover to Prague, however, Jardine must first extricate himself from France, where his attempts to smuggle guns to Spain have been held up by a group of fanatical fascists...