June 1940. As German troops pour across France, the veteran soldier & adventurer Richard Hannay is called back into service. In Paris an individual code named ` Roland` has disappeared & is assumed to be in the hands of Nazi agents. Only he knows the secret of the Thirty-One Kings, a secret upon which the whole future of Europe depends. Hannay is dispatched to Paris to find Roland before the Germans overrun the city. On a hazardous journey across the battlefields of France Hannay is joined by old friends & new allies as he confronts a ruthless foe who will stop at nothing to destroy him. The lights are going out across Paris & time is running out for the world as both sides battle for the secret of the Thirty-One Kings.