Aiz is stronger than ever, but she has never been more restless. The blackrobed "client" who lured Lulune Louie into a dangerous job is roping in the Sword Princess with a quest she can't refuse. She knows full well how wary she should be, considering this person's last job ended in an adventurer's brutal murder, monsters attacking Rivira, and Aiz's battle with a distressing monster tamer who confronted her with a name no stranger should know.
But when she is offered clues that could lead to revealing her new enemy's identity, Aiz launches herself headfirst into the Dungeon--alone. Loki...

After the tumultuous events in the Dungeon, Aiz has finally reached the vaulted Level 6! But in spite of this amazing news, the Sword Princess seems to be completely depressed. Meanwhile, from the depths of the Dungeon comes a mysterious crystal ball that's about to plunge both underground and surface worlds quietly into chaos.

Having just returned from their latest Expedition, Loki Familia's search for the rumored second entrance to the Dungeon has brought them to the port town of Meren. A certain playful goddess is doing as she pleasesEright up until a foreign ship brings a storm in its wake.wake.

After the massive battle on the 59th floor, Loki Famila makes their return. However, along the way their progress is halted by the appearance of an Irregular and they make camp on the 18th floor. There, Aiz faces an unexpected and sudden reunion with a certain white-haired boy that a certain young elf couldn't be less excited to see. The other adventurers are all curious, hoping to find out more about the fastest growing adventurer in history but Lefiya has other ideas...