In a world where human consciousness can be transferred into robotic bodies using the precious ore 'orichalt,' the Excavate Company, led by the daring Grayman, mines this valuable resource. When rescuing Maya Mikuri, a student accused of stealing orichalt secrets, their fates intertwine. Together, they embark on a transformative journey, offering Ido, a skilled member with a forgotten past, the possibility of rediscovering his lost identity.