Volmaro of Culario and Bracchus (of nowhere in particular) arrive at the fort-town of Venarium, where they have been assigned, as reinforcement to the legion of General Andratius. Only half of the legion, which comprises 1.000 men, is stationed at Venarium, but most of the men are currently in maneuver. Those stationed in the camp seems to enjoy an almost civilian life. After having acquainted themselves with the military camp, they visit the common house of the settlement, where they are to spend the night. But in the middle of the night, a granary explodes.