Alair is a boy who lives on the border of the late Roman Empire. In a garrisoned city that protects from raiders and raiders, Alair dreams of being the banner bearer of the legion stationed there, and there is no greater honor than wearing the Draco. With his friends Zía, Mauri, Otmaro and their inseparable Gato and the dog Ee, they live their adventure along the Great River that separates the empire from the mysterious and wooded lands of the Tribes. Fun work in the form of a story. With a historical background that is given from the author's previous books. Profusely illustrated for children, however, it preserves the documentary style that shows precious decorations based on real monuments and archaeological pieces of the time. Childish but with a cultural touch. Curiously, it has been financed with cameos of real people that appear in the characterized illustrations of the time!