Burdened with massive debt, a married couple flees in the night and begins working as live-in staff at a house cleaning company. However, while her husband sleeps nearby, the wife, Megumi, is violently assaulted and forcibly taken by the shop owner. From then on, she falls under the owner's relentless sexual domination, enduring daily abuse as she gradually breaks down between pleasure and pain. As this continues, her relationship with her husband deteriorates further, driving both of their lives completely off the edge.