A young man is transported to another world where he helps to rebuild its flagging economy.

Gaius leads an invasion force from Amidonia into the kingdom and lays siege to the city of Altomura; while Red Dragon City receives its own surprise attack, in Randel, the Forbidden Army constructs a fort from which they engage Georg's forces.

The Amidonian army launches a full-scale attack to retake Van under Gaius's command, but Souma and his forces move to stop them; after the war, there are serious consequences to be faced and plans for reconciliation.

Jeanne Euphoria of the Gran Chaos Empire is sent to Van to deal with the occupation.

Jeanne sees a new future and a new world in Souma.