- Story background: The story takes place in a modern city called Jianghai City. It is prosperous and peaceful on the surface, but in fact it hides many unknown secrets. Recently, the director of the museum died mysteriously. A mysterious bronze compass and strange symbols were left at the scene, which implicated a series of cases related to the "Jiuli Society" in ancient books. This mysterious organization seems to be inextricably linked to an old case twenty years ago.
