Explore endless possibilities in this fantasy series that inspired the hit anime!
In an age when the corners of the world have been scoured for their secrets, only one place remains unexplored - a massive cave system known as the Abyss. Those who traverse its endless pits and labyrinth-like tunnels are known as Cave Raiders. A young orphan named Rico dreams of following in her mother's footsteps as a Cave Raider, and when she meets a strange robot when exploring the Abyss, she's one step closer to achieving her goal!
Riko and her friends have finally made it to the sixth layer! Not long after taking their last dive, they find themselves in a village populated by Hollows who possess a peculiar sense of value. Mysteries, terrors, and bewildering truths await them in the Abyss' deepest depths!
