Magnum is a criminal organization composed of foreigners who specialize in kidnapping, holding captive, and repeatedly raping women, turning them into slaves. 25 years ago, a female investigator failed to capture them and became a sex slave. 25 years later, Ren, the daughter of the former investigator, who was born from Magnum, harbors a deep hatred for the organization. She is determined to wipe out Magnum to avenge her mother, who bravely fought against them in the past. Unfortunately, both she and her superior were captured. They were repeatedly raped, and even made her boss participate. From this, she also learned the truth that her mother did not resist but quickly enjoyed the pleasure that these huge cocks provided. Her boss was the one who had sex with her mother 25 years ago. Upon discovering the truth, she didn't know what to do, what to strive for. She let go and accepted to become a sex slave for them, accepting a life similar to her mother's 25 years ago...