In a future urban "dream" where memories can be extracted, traded and erased, Lin Zhou, a top memory appraiser, makes a living by stripping away the pain of others, but he has already built an island of emotions in his heart. One day, he encounters an amnesiac girl called "Zero". Her memory is like a completely formatted blank, but behind it lies a dark secret that can subvert the entire memory industry. In order to retrieve "Zero"'s past, Lin Zhou was forced to dive into the deep sea of forgotten memories, but unexpectedly uncovered the truth that he had buried long ago. In this pursuit and escape, he must redefine: when memories can be bought and sold, what is the essence of a person?