Made in Abyss—What lies at the bottom is unknown as no one has returned from it, but the Abyss is full of strange creatures and priceless relics that have trapped generations of fortune hunters. Anyone can safely descend into it, but returning triggers nightmarish transformations and madness as the chance of remaining unchanged lessens the deeper you go. Learning that her missing mother may still be alive in it, 12-year-old Riko and her robot friend Reg brave entering its darkness.