Investigator Ayaka traces a disappearance to the Black Lion Society but is captured while pursuing the case. Bound and sexually molested, she is dosed with the illegal drug she had been investigating, then subjected to humiliation, assault, and relentless pleasure torture. Her trained body fights wave after wave of stimulation, but keeps reacting and climaxing in panic until pleasure takes complete control and turns the hardened agent into an insatiable sex monster.