Inugami Sahei, who built up the wealth of the Inugami Clan, passes away, leaving a will with Furudate, his legal adviser, for his daughters Matsuko, Takeko and Umeko, all of whom have different mothers, and for their sons, as well as for Nonomiya Tamayo, the granddaughter of a person to whom Sahei feels heavily indebted. The will states that all his assets are inherited by Tamayo alone, on the condition that she marries one of the sons of the daughters. Furudate's assistant learns the content of the will, and seeks advice from Kindaichi Kosuke, a private detective, as he senses the air of unease. Shortly afterwards, murders start to occur one after another in the clan.
as Kosuke Kindaichi
as Tamayo Nonomiya
as Sukekiyo Inugami
as Matsuko Inugami
as Takeko Inugami
as Umeko Inugami
as Suketake Inugami
as Suketomo Inugami
as Saruzo
as Fujisaki Kanshiki-ka-in
as Osono
as Nasu Hoteru Shujin
as Senba Keiji
as Kokichi Inugami
as Sahei Inugami
as Haru
as Jochû
as Sayoko Inugami
as Toranosuke Inugami
as Todoroki Shochô
as Kashiwaya no Kyubei
as Kikuno Aonuma
as Hisao Wakabayashi
as Keikan
as Keikan
as Misaki no Kodomo
as Shujii
as Jochu
as Akanbo
as Sanbo
as Oyama Shinkan
as Koto no Shisho
as Kashiwaya no Nyobo
as Furudate Bengoshi
