Receiving a request from a marriage broker operating in a run-down area, Left (Hideo Nakano) and Yamato (Yasukaze Motomiya) find themselves helping with a fake marriage. Many of this broker's cases involve the Goroza family, who are involved in human trafficking and insurance fraud, manipulating household registries. Amidst this, Yamato's fake bride, Shirayuki, is brutally murdered after having her organs harvested. Angered by this heinous act, Left and Yamato, without any directive from the third-generation leader of the Kurotetsu Alliance, Sakaki (Sho Aikawa), take on a rival gang. Thus begins a bloody purge driven solely by their unbacked "chains."