The tale of a forgotten crusade, erased from history because it fell into the shadow of the devil. Jerusalem is in the hands of Sultan Ab'dul Razim, and the Christians have raised an army to take it back, led by Grégoire of Arcos and the Duke of Taranto. Only Gauthier of Flanders and his sister-in-law Syria of Arcos are opposed to an attack they deem premature. But the stench of brimstone covers everything, and in a war fought in the name of God, it is the Qua'dj, a demon, who could decide the fate of the Holy Land...