Souma dispatches his magically-controlled mascot warrior to join an adventurer party. After securing funding with his team of accountants, Souma sets out to build a new port city and network of roads, but runs into opposition from the local residents.

Under Gaius's command, the Amidonian army launches a full-scale attack to retake Van, but Souma and his forces move to stop them. In the aftermath of the war, there are serious consequences to be faced and plans for reconciliation to be put into action.

Van is returned to Julius as a result of the mediation of the Grand Chaos Empire, in exchange for a great deal of reparation costs. Souma returns to the Kingdom of Elfrieden, where many other problems yet remain.