After the grand festival, merchants confront Mjöllmile and accuse Rimuru's people of trying to cheat them out of their money with non-dwarven coins. Despite assurances of immediate payment in other currencies, the merchants insist on dwarven gold coins, expressing their distrust of the monster nation. Duke Muese of the Kingdom of Ghastone intervenes, pretending to mediate but secretly attempting to manipulate Rimuru.

Rimuru arrives and resolves the dispute by handing the merchants and Muese genuine dwarven gold coins. He then severs business ties with the distrustful merchants, declaring that his people only wish to trade with those they can trust. Rimuru declines Muese's offer to mediate with the council, hinting that he is aware of Muese's ulterior motives and is waiting for the true mastermind to reveal themselves.

Later, Rimuru meets with his allies to discuss the outcomes of the festival and future plans. King Gazel Dwargo expresses concern over the massive magical displays seen above the arena, recognizing their potential military applications for reconnaissance and strategy. Rimuru acknowledges the significance and regrets not having thought of it sooner.

Empress Elmesia and Rimuru discuss sharing technological advancements, particularly the development of the Magitrain, a magic-powered train system that could revolutionize transportation and trade between nations. They agree to collaborate on research, integrating Thalion's magical science and Dwargon's spirit technology into the project. Momiji consents to the construction of a tunnel through her people's sacred mountains on the condition that Benimaru oversees the project to facilitate the expansion of the Magitrain network.

Veldora voices disappointment that adventurers aren't delving deeper into the dungeon he guards. Mjöllmile proposes introducing rewards for those who conquer every hundred floors to attract powerful adventurers and boost the dungeon's popularity. Yuuki, representing the adventurer's guild, agrees to oversee the reward system and implement adventurer cards to manage challengers in the dungeon.

Hinata suggests sending high-ranking priests of the Western Holy Church to train in the dungeon, as it provides an excellent environment for honing their skills. Rimuru agrees, as it benefits both sides—having healers capable of using holy magic and giving priests the opportunity to advance their abilities.

The group discusses the eastern merchants suspected of engaging in manipulative activities. Rimuru and his superiors suspect they are connected to the moderate Harlequin Alliance and possibly Yuuki, who might be orchestrating events behind the scenes. However, lacking concrete evidence, they decide to prepare quietly for future conflicts.

Meanwhile, Duke Muese laments his failure, and it is revealed that Granville and Maribel of the Rozzo family are the masterminds behind the schemes targeting Rimuru's nation. Maribel declares her intent to seize everything, claiming the world belongs to the Rozzo family.

The episode ends with Rimuru learning that the Jura Tempest Federation will receive a letter from the Western Council a month later, signaling the beginning of a new challenge.