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

Juna and Poncho give their take on udon noodles; Marx insists that Souma get some rest as he steps down as prime minister; Souma, Liscia, and Aisha go incognito as they take a tour of the castle town.

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.