Investigator Mizuki is a highly skilled operative who has successfully completed numerous undercover missions. This time, she is ordered to infiltrate a deal involving aphrodisiac-laced oil. The mission appears straightforward, but Mizuki is captured by a shadowy organization and falls into a trap of torture. Facing an unexpected turn of events, she desperately clings to hope and endures—until pleasure gradually overwhelms her, breaking her resistance completely. Overcome by intense sensations far stronger than anything she experienced during training, her slender body convulses uncontrollably as she reaches climax after climax. She is no longer an investigator. Mizuki has vanished, transformed into a pleasure-dominated female slave.