Yuuya runs a small construction company, but due to the economic downturn, his business is failing and he can no longer pay his employees' salaries. His personal life has also become desperate, and unable to confess the truth to his wife Chiharu, he suffers in silence every day. One day, an employee named Nakata, furious over unpaid wages, shows up at Yuuya's home. Panicking, Yuuya tries to drive him away, but Nakata, enraged by his attitude, begins by assaulting Chiharu. He then blackmails Chiharu's older sister Hina into joining them, forcing the sisters into a degrading threesome and reveling in the violent encounter. Nakata's disturbing behavior doesn't stop there—it spirals into even greater depravity.