Specialized penitentiary was designed from the ground up to hold Japan’s most ruthless female inmates. That makes it doubly deadly, because while the guards may be brutal and sadistic, the inmates outnumber them by a hundred to one! At any second the final, fatal riot may erupt, stoking the flames of a thousand forbidden desires into an all-consuming inferno where it’s every woman for herself! The shocking reality of Japan’s secret prison system is exposed in Chain Gang Girls!
Yoshiko Sejima (Reiko Nakamura) gets a call from a man claiming to be from her husband’s company. He tells her that he will come to pick her up on behalf of her husband. It turns out that he’s a kidnapper and takes Yoshiko to a hotel, and proceeds to rape her. This man Fuji Nakatogawa (Johnny Okura) calls Yoshiko’s husband but doesn’t request a ransom. He’s just bent on humiliating Yoshiko to submission to be his sex slave.
The story revolves around a pachinko parlor worker named Shiori (Aoi) and her aspiring musician boyfriend, Tetsu. The two of them travel from Kyushu to Tokyo together and struggle to stay afloat while Tetsu chases his dream. Tetsu’s younger brother eventually shows up and the two brothers form a duo and start to play some shows together. Later, Shiori gets recruited as a gravure idol while Tetsu gets involved with a local yakuza and cheats on Shiori with another woman. Tetsu continues loving Shiori, but big city life gradually tears them apart.
Whilst working for a women’s magazine, writing articles about rape victims, Nami conducts an interview with a stripper and views a strange sex show. She leaves before the end, despite a weird man’s insistence that she stay. The next day, Nami visits another rape victim and takes pictures until she meets the man from the sex club. He claims to work for a porno publisher. He cautions Nami on her growing obsession with rape stories. Nami continues to dig deeper in her research and soon starts having fantasies of rape as she comes closer to a fate that could be worse than death.