The episode begins with Earth finding herself in a difficult situation, paralyzed by a "stun" effect during a battle. The episode reflects on the events that led to this moment and rewinds time.

Earth had been honing her skills in the dungeon "A Challenge From the Departed," focusing on lockpicking and disarming traps. Her dedication pays off as her Thievery skill reaches level 50, unlocking the option to advance either as a "Superior Thief" or a "Benevolent Thief." Earth chooses the latter, fascinated by its unique abilities like stealing from monsters and bonuses for sneak attacks.

During her dungeon excursions, Earth teams up with the "One More Rangers," a group of players who deal with colors. Their shared interest in trap disarming brings them together, and Earth's ability to detect threats proves invaluable in overcoming the dungeon's challenges.

Earth's understanding of the dungeon's mechanics grows, especially when she notices that monsters are attracted to light. She uses her "Farsight" ability to minimize encounters and delve deeper into the labyrinth. Eventually, she reaches the ninth floor, where she encounters Liches that inflict status attacks and summon additional monsters.

In a race against time, Earth navigates numerous traps to reach the staircase to the final level. Surprisingly, the timer stops, and she encounters Andre, a skeletal knight and former knight of the empire. Andre shares his tragic story of becoming a dungeon guardian after his army was decimated. He asks Earth to end his existence and free him from his cursed state.

The battle with Andre is intense. Earth's agility and tactical use of her "secret secondary bow," which rapidly fires special arrows, keep her in the fight, even as the "Break Arms" effect renders her primary bow useless. The duel escalates when Earth invokes the power of the Fairy Queen with the spell "Elder Prism Nova," hoping a status effect will turn the tide.

The Fairy Queen's intervention through the ring Earth wears creates an illusion that distracts Andre, allowing Earth to unleash a barrage of arrows and defeat him. Grateful to be freed as a human rather than a monster, Andre gifts Earth his knightly sword, a valuable antique.

The episode concludes with an announcement in the game world that one of the dungeon's secret bosses has been defeated, unlocking the new weapon, the Knightly Sword.