While exploring the Abyss, Riko comes across something she has never seen before.

Riko and her friends attempt to figure out exactly what Reg is, but cannot find anything mentioning a robot in the list of recorded relics recovered from the Abyss.

Reg goes on his first cave raid! Meanwhile, Riko makes preparations to go into the Abyss to find her mother.

Riko and Reg start their adventure into the Abyss. While there, they run into an unexpected familiar face.

Riko and Reg descend into the Forest of Temptation. What new dangers will they find lying in wait for them there?

Reg and Riko make it to the Seeker Camp where they meet Ozen the Immovable, the person who saved Riko all those years ago. But there is more to Ozen than meets the eye...