A string of bizarre murders occurred where the victims were found to have most of the blood drawn from their bodies. Due to the methods used by the killer, they were called "vampire incidents," and similar incidents were also occurring in America.

The vampire that attacked Leo was a demon called a "parasite." The Saegusa and Jumonji families decide to join forces to solve this case. Mikihiko and Erika search for the parasite to get revenge for Leo, and they confront a mysterious masked magician.