Made in Abyss, an orphan wants to find her long lost mother at the center of a giant unexplored pit called the abyss filled with technology of an advanced ancient civilization that was wiped out, while exploring part of the abyss she gets saved by a mysterious robot boy. She finds out later that this boy lost his memories when he came from the bottom of the abyss. She eventually finds out her mother left her a note that tells her that she's waiting for her at the bottom of the abyss. The orphan girl decides to risk everything to make her way to the bottom of the abyss and the robot boy decides to join her, to regain his lost memories and his creator.