Chris warns Kazuma the body-swap necklace is a dangerous sacred relic with life-threatening powers. Princess Iris's life is endangered when two robbers in black infiltrate the royal castle at night, likely after the necklace.
Kazuma and his friends attempt to defeat Coulomb's Hydra but fail due to low-level adventurers, a bandit spree, and a bounty. However, for some reason, Darkness insists on defeating the Hydra.
Alarm sounds in the royal capital as the Devil King's army attacks. The adventurer's guild summons high-level adventurers to battle. After failing to capture a thief, Kazuma joins the fight to redeem his reputation.
Kazuma thinks of a way to stay in the capital for Iris's sake, and declares that he will capture the thief who's causing a stir in the streets! Since the thief targets nobles with bad behavior, Kazuma and his friends decide to stay at Alderp's mansion.
Kazuma and his friends return to Axel and receive 300 million eris as a reward for subjugating Sylvia, an executive of the Devil King's army. Kazuma and Aqua go to high-end restaurants, and Aqua enjoys her long-awaited life as a celebrity.