The Blood Rain of the One Hundred Foxes of Shinshu - Part I.Sakon is invited by the Akizuki family to give a Bunraku performance. After the performance, the head of the family, Souichirou Akizuki receives a call and suddenly leaves. Meanwhile, Sakon is told that there have been slasher killings in the nearby village, and Akizuki's eldest son, Kyouichi is the main suspect. He has gone missing with an apparently cursed Byakko sword. A few hours later, another call is received saying that Souichirou has been murdered by his own son!