Milo and his companions navigate the labyrinthine corridors of a dungeon built entirely of books, facing warded shelves that punish the curious with crystallization. They discover that the library functions as a circulation desk, not a vault, requiring them to request books rather than steal them. By correctly identifying themselves as "Readers," they bypass the lethal traps and acquire crucial resources, specifically a treatise on crystallization suppression for Kira and offensive skills for the team. The climax involves defeating a Bound Enforcer golem and realizing the true nature of the dungeon's mercy. The experience cements their bonds and gives Milo a glimpse of the power his Talent truly holds, transforming him from a scavenger into a wielder of forbidden history. The group escapes with their lives and a growing arsenal of knowledge, but the cost of the victory weighs heavily on them as they return to a world that has moved on without them.

Forced back into the Archive by a sudden recall, Milo is stripped of his "Knowledge Sage" status and degraded to "The Fool" after a brutal psychological trial in a void of darkness. The entity testing him forces him to relive the death of his sister in a simulation, breaking his arrogance and pride. He is then dropped into a classroom setting, stripped of all combat abilities and left to teach a class of children how to summon golems using their own domains. This section explores themes of humility and mentorship. He learns to read properly for the first time, gaining "Insight," and watches his students, particularly Oliver, succeed despite their limitations. The class culminates in a confrontation with the King, who threatens to burn the school, forcing Milo to stand between the monarch and his students, effectively choosing rebellion over survival.

The King visits the school, observing the children's golems and declaring the entire class a threat to the state because they believe they are allowed to reach for more than they were born into. In a moment of desperate heroism, Milo summons two massive ink-forged knights to defend the room, shattering the illusion of the King's invulnerability. The children, inspired by his sacrifice, rush back into the fray, creating a chaotic storm of half-formed magic to stand alongside their teacher. This act of defiance cements Milo's transformation from a fugitive into a leader. The trial concludes with the children escaping into a cave, where Milo is rewarded for his survival and loyalty, earning the "Professor" class and restoring his combat abilities, now fully integrated with his new role as an educator.

Milo returns to the body of Bartholomew Fitch and reunites with Osmund Thale, the wealthiest man in the kingdom. Osmund reveals a staggering secret: he possesses over a hundred talents, far surpassing Milo's. Together, they formulate a plan to overthrow the King by gathering resources and forces. Milo travels to the Ashfen Marches to solo a World Boss, a task meant to kill him but which he survives through sheer skill and the new "Professor" class. He returns with Mythic-tier loot and a ship, The Overdue, captained by the formidable Hollow Tide. The stage is set for a direct assault on the capital, moving from the shadows of the Ashfen Marches into the heart of the enemy's territory.