Investigator Yui Nishikawa decides to infiltrate a hospital to get close to a doctor involved in the development of illicit substances. However, just before she can gather evidence, she's unluckily arrested. Treated as a sex object by the vicious culprits, she's forced to endure humiliating days. A powerful aphrodisiac shatters her previously unwavering commitment to justice, and she's completely dominated. She's violently fucked, her cool demeanor distorted, and her innocent heart gradually broken.