Spain in the 15th century: the conflict between Christian and Muslim rulers for supremacy in the country has been raging for almost 700 years. Spain is divided into several kingdoms, counties, provinces and an emirate. Catholics and Moors, but also Basques, Galicians and Catalans fight for dominance in various areas. The influential grandees, the country's nobility, play a crucial role. They send their brave knights, the Caballeros, to conquer new regions. With every castle they capture and defend, their influence grows. Who will manage to win the battle to win Spain and become “El Grande”?