Enrique de Münster manages to escape the abbey and join a group of rebels operating in the region, shielded by the rugged terrain of a dense forest. His plan is to subject these men to rigorous military training to raise a small, well-disciplined army. This force would allow him to briefly infiltrate the fortified monastery and seize the prized treasure-a precious relic that is, simultaneously, an object of power. For him, the ultimate goal is to liberate Germany from Frankish rule and the spiritual yoke that, in his view, the Church represents.

Incomprehensibly, King Charles has left the enclave with almost no protection. The lord of the land, the Count of Worms and brother of Bernardo, along with the bishop, Guido de Urbino, decide to take matters into their own hands. A battle is brewing in the frozen heart of the harshest winter even the eldest can remember. However, the abbot refuses the permanent presence of professional soldiers within the abbey walls, only authorizing their entry for a very specific and timely intervention.

Under such circumstances, it is of vital importance to know the exact moment this raid will take place. Meanwhile, Bernardo progresses at an unusual speed in his studies; both the bishop and the great Alcuin-the King's teacher and friend-place high hopes in him. Indeed, both Guido de Urbino and the King have their eyes set on Spain.