As German troops pour across France, an individual codenamed "Roland" has disappeared and is assumed to be in the hands of Nazi agents. Only Roland knows the secret of the 31 Kings, a secret upon which the future of Europe depends. Veteran adventurer Richard Hannay is dispatched to Paris to find him before the Germans overrun the city. On a hazardous journey across the battlefields, Hannay is joined by old friends and new allies as he confronts a ruthless foe determined to destroy him.