Shibuya, Tokyo. Yoichi et Michio sont deux voyous qui gagnent leur vie comme bookmakers lors de courses de chevaux. Un jour, le compagnon de Yoichi commet un crime, ce qui l'amène à devenir un véritable yakuza. Yoichi souhaite ainsi mettre un terme à ses jours de voyou, mais d'un autre côté il doit laisser derrière lui son frère Michio...
An attorney from Yokohama is found murdered at Lake Toya in Hokkaido. Uematsu (Noi Yasuo), of the Hokkaido police goes to Yokohama in search of Konno Shizuka (Watanabe Azusa), a woman who may know something about the case. He tries to take her in to the station for questioning. Muta (Kobayashi Keiju) happens to be there as well. Muta learns that Konno has a debt with a moneylender in Hokkaido.
A woman is discovered strangled inside a car, and Inspector Muta of the Yamashita police station hurries to the scene! The relationship between the murdered woman and a suspect whom the new Assistant Inspector, Iwaki, has been pursuing for one year will soon become clear...