In the future city "Xinhai" where memories can be extracted, stored and traded, Chen Mo, a top memory restorer, is immersed in the work of repairing other people's broken memories all day long, but he is unable to piece together the truth about the day his sister died. A mysterious commission brought a memory crystal that was on the verge of collapse. When Chen Mo sneaked into it, he discovered that this chaotic ruins of memory were inextricably linked to his lost past. He is forced to embark on a dangerous journey, between the technology giants and underground organizations, to unearth buried secrets and to fight against the sea of oblivion that can swallow everything.