In a world where memories are stored in separate memory chips, transcending the physical body, death no longer signifies the end of one's essence. The affluent exploit this technology to prolong their existence by inhabiting carefully chosen vessels, while the impoverished resort to selling their bodies to sustain their souls trapped in chips. A luminous barrier, the electrolytic cloud, divides the privileged heavens from the destitute underworld, creating an insurmountable social schism. Awakening without memories and bearing a mysterious cavity in his chest, a man named Kaiba sets off on an enigmatic journey clutching a locket with a woman's image. Evading danger, he encounters a dilapidated village of underworld dwellers, embarking on a quest across diverse planets to decipher his identity and the enigma of the woman in his locket. Amidst his odyssey of self-realization, Kaiba unravels profound narratives of souls and delves into the significance of memories, embracing a voyage that intertwines spirits and self-discovery.