Maki Amamiya, secretary to the branch manager of Hishi Bank, visits a mountain villa owned by a client who has defaulted on loan payments, only to be verbally abused by the property's manager. However, when evidence of her affair with the branch manager is exposed, she is assaulted by a group of degenerate men. Subjected to extreme humiliation including forced urination, being doused in filthy water, and doggystyle gangbangs, her pride is utterly destroyed. Caught between shame and pleasure, Maki awakens to her inner masochist. Ultimately embracing her new role as a depraved sex slave, she begins walking a new path of sexual servitude.