Errolanen elezaharra

778. Charlemagne, conqueror of the Germanic kingdoms and protector of the Church of Rome, needs to establish the Spanish Mark in the south of the Pyrenees in order to resist the attack of the Islamic empire. Thus, the followers of the most powerful king the Frankish army has ever known have set out for Zaragoza, as he was promised, to take possession of the great city in the north of Hispania. But when he gets there, the king will find what he doesn't expect.