As her colleagues are caught up in a series of disappearances of drug investigators, Souka grows more and more angry and frustrated with each passing day... She gets information that the mastermind is the evil organization Kuroshishi-kai and begins her investigation, but she falls into a trap and is captured. While restrained, her body is played with, drugs are administered, and she is humiliated, violated, and put into a hell of pleasure! She fights desperately with her trained body, but the waves of pleasure never end! Her body reacts and she comes again and again in a state of panic, turning Souka into a sex monster who goes crazy with pleasure, exceeding her limits...