Beautiful and gentle caregiver Ryoko has long maintained a secret intimate relationship with the son of her client. One day, her affair is discovered by the elderly man she cares for, Jukizo, exposing everything. From that moment on, Jukizo's demeanor shifts drastically, consumed by uncontrollable, depraved desires for Ryoko. His aged body driven by cruel lust, he and other older men relentlessly close in on Ryoko's soft, vulnerable frame, subjecting her to intense humiliation and abuse.