In Xinhai City, memories can be repaired, tampered with and even traded. Lin Mo, the top memory weaver, can sneak into the deepest consciousness of others and repair broken memories. When a mysterious woman brings an impossible commission - to implant a memory about an isolated island lighthouse that she has never experienced before, Lin Mo discovers that that lighthouse is actually the end of his own nightmare every night. To uncover the truth, he must dive into the most dangerous sea of memory - his own sealed past.