In the "Mirror City" where memories can be read and edited, top memory lawyer Lin Mo was hired to investigate a seemingly simple suicide case of a celebrity. However, while diving into the depths of the deceased's broken memories, he encountered a "memory remnant" that shouldn't exist - a fragment of the deceased's consciousness. This silent "ghost" guides him to uncover a perfectly covered up crime. As the investigation deepens, Lin Mo not only has to fight against the murderer hidden in the data torrent, but also faces the trauma caused by the death of his wife, and the terrifying truth behind this technology that can subvert the entire social order.