A serial blood-sucking murder case broke the original tranquility of the Rhine town. All the people in the Rhine town fell into panic. From the examination of the corpse, it appeared that it was caused by a legendary creature that lives in the darkness - a vampire. The mysterious cat boy took the initiative to serve as the captain, and gathered six young girls from the Saint Ruth Academy who were vampire hunters with different personalities. They started a fierce battle with the so-called culprits of the serial blood-sucking murders - the vampires... The mysterious boy who fell from the sky, the sleeping vampire emperor, the sudden disappearance of Feng Xiaoxie, the increasingly weird Miyazawa Qi, the mysterious crystal ball prophecy, the divided five-point map, and the black hand reaching out to them. . . One bizarre incident after another, one murder after another, one character after another disappearing. Who is the source of everything behind the scenes? What kind of mysterious power will the jade known as the sacred stone have? ······