Two friends - the former villan Jacques from the village of Montelier and the impoverished knight of the Ardennes, Sir Robert de Merlant, finally became full members of the Order of the Holy Sepulchre, one of the most powerful secret orders of the crusader brotherhood. Now, fulfilling the will of Pope Gregory the Ninth, Jacques and Robert, as part of a detachment of knights, goes on a secret mission to Baghdad to secretly meet with the heirs of the great Genghis Khan. We will talk about the treasures of the Master of the Universe...But the enemies are not asleep and every step of the heroes will be paid for in blood... “A Knight’s Duty” is a continuation of the novel “The Knight of the Holy Sepulcher” already known to the reader.