In the Middle Ages, four pilgrims come together to make the Camino de Santiago. One of them, Blasco Jiménez, feels called to tell his story to others. As a child of very humble origin, he was protected by Don Bricio, a warrior and wise cleric. With him he participated in the foundation of the city of Ambrosía, the present Plasencia, of which he would become over time military and Archedian chief. An eternal dilemma can be recognized at the heart of this story: the difficult choice between fidelity to duty or one's freedom. But at the same time, in El alma de la ciudad the history of Humanity is discovered through the great metaphor of homo viator (man on the way).