With memories stored separately from the physical body, death no longer means the end of the soul in a world where people can view, alter, and transfer their memories between bodies using memory chips. The wealthy obtain eternal life by carefully selecting bodies to inhabit, while the poor sell their own bodies to earn a living and conserve their souls in chips. A division between the fortunate and the destitute is created by an electrolytic cloud in the sky. After waking up in an empty room with no memories, a hole in his chest, and a locket holding the picture of an unknown woman, Kaiba embarks on a journey to discover his true identity and the woman from the locket. His adventure takes him across different planets in this strange universe and introduces him to the importance of memories and their connection to the soul. Through self-discovery and acceptance, Kaiba weaves together tales of souls and spirits, all while exploring the intricacies of the memory chips.