It is the sequel of the novel Imperium Solis (uchronia) published in 2009. In the year 363 AC, Emperor Julian, after he escaped an assassination attempt during the campaign against the Parthians, flees to America in command of a legion of loyalists. In this new land, where the god “Sol Invictus” hides at the end of each day, he founded a new empire, thanks to the alliance of Native Americans. After more than forty years, now old, Julian decided to return to Rome to take back the throne that had been stolen by a conspiracy. Sets up a large fleet and a powerful army, and crossed the ocean, lands in Gaul, determined to reunite the Empire of the West with that of the East. A brave warrior half-breed in command of a special legion will help him in the enterprise.