A "bat homicide" casts a shadow of terror over a quiet town, with a series of mysterious and unsolved cases leaving the police stranded. Ten years ago shocked the truth of the case of blood surfaced, hunting ghost bureau's involvement in the investigation, is to find out the real culprit? Or does it make things more complicated? A wave did not level a batch rise again, a pile of horrible flay murder case happens one after another, the dead all have beautiful body, is female ghost of killing? Or is it man-made? Who, after all, is running the show? Who is the real culprit? Is a ghost? Or is it... Those nameless creatures. Seemingly ordinary girl Yin Shi Xue, behind what kind of secret hidden?