Library

As the manager of the office, Jiang Yulou has had a necklace hanging around his neck since he was a child. Even he can't remember who gave it to him. He only knew that he had a friend who would appear when his necklace glowed, but this friend seemed to be of a different kind to him. This world is divided into three realms, the upper realm, the human realm and the ghost realm, and the three realms coexist peacefully. A series of strange cases, each subtle clue, see how Jiang Yulou finds the truth from the details.