You were a detective assigned to a new serial murder case with your new partner Kazutora. Until now, you always worked alone but now it was different, the sacrifice was too much. You and Kazutora scouted out several locations and soon you began to figure out who the killer was. But when you were walking on the street someone attacked you, Kazutora found you and took you at his place. Although the biggest secret was that he committed these murders because he couldn't control his bloodlust.