An accident allows ordinary librarian Lin Zhou to inherit the last memory of police detective Chen Bo who died in the line of duty. From then on, unfamiliar professional knowledge, lingering obsessions and fatal dangers poured into his life. In order to protect himself and appease the ghosts in his mind, he was forced to embark on a dangerous journey to pursue the truth. However, the closer he gets to the truth, the less clear he is about who he really is.
