Undercover investigator AIKA has successfully dismantled numerous criminal organizations, earning her a top-secret mission from her superior due to her outstanding performance. Things proceed smoothly as usual, but for some reason she's discovered by the enemy and captured. Her body is tormented by the men, and a humiliating life of confinement begins. Initially resisting fiercely, she's forced to ingest drugs that induce repeated orgasms, gradually breaking her down until she submits like a submissive female dog. The story depicts her escalating physical pleasure and the wavering of her mind throughout this process.