Sister Minami, burdened with massive debt. Younger sister Luka, made a co-signer. One day, Luka is shown a video letter by men in black suits who come to her home. The video captures the brutal assault of Minami in front of her husband. Minami has been imprisoned by an underground organization as collateral for the debt. Luka is then taken away by the men and reunites with Minami in a foul-smelling basement, but what awaits them is a stage filled with applause, cheers, and the growls of men, drenched in madness…
