The end of the 12th century is approaching. Pope Innocent III announces a new crusade with the intention of conquering the holy city, which a few years ago surrendered to Sultan Solomon and his army. While the highest French sinew mobilizes for a new epic expedition, an encounter with Prince Alexis, heir to the Byzantine emperor, changes history: This crusade will not go further than Constantinople. Choose one of three knights who will embark on their adventure and fight against the soldiers of the Byzantine Empire in the heart of the crusader army.