Hermes, the god who never stays in one place, unexpectedly returns to Orario. And there is a very specific reason—Bell, the newcomer who is on everyone’s lips. But the deity isn’t just trying to satisfy his restless curiosity: he clearly knows something about the past of the young adventurer… Meanwhile, the newly formed party of three friends led by Bell is ready to challenge new depths of the underground labyrinth.
So the team, having prepared thoroughly, plans to go all the way down to the 13th floor—the beginning of the so-called “middle floors.” There, they can not only encounter far more dangerous monsters, but also earn more generous rewards. The only problem is that the dungeon is unpredictable, and in its dark depths anything can happen at any moment. As Bell descends into the labyrinth’s dark corridors, he has no idea how soon he will have to see the sunlight again—and what he will have to overcome to make that happen…