In the untamed borderlands of the Algars River, where the crimson cross of Calatrava meets the white eight-pointed star of the Hospital, merchant Arnau of Vall de Roures discovers that true power is not measured in coins, but in the secrets held within the earth[cite: 4, 5].
While the Bishop of Tortosa fortifies a forbidden library in the North Tower of Horta—guarding alchemical treaties and ancient Templar scrolls—Caterina of Fontcalda, a daughter of fire and science, begins to reveal a burning truth: the secret of Greek Fire hidden beneath the roots of Santa Bàrbara.
Meanwhile, in the high crags of the Ports, the scout Siles, cloaked in the terrifying legend of the Simiot, seizes "God’s Vein" from the depths of the rock. It is the native gold that could ignite a war for the soul of the Matarranya or purchase a peace that everyone thought was lost[cite: 4, 5].