Clover receives a nomination quest from the king himself to investigate Achromatic Darkness! The group's dream to enter the Abyss Gates nears, but before they set off, they need a deft scout to temporarily assist them on the mission. Luckily for them, Mamar has a pupil who just might fit the bill! However, once in the dungeon, there seems to be more than meets the eye-and more than monsters that want to see them fall...