Mayumi is sent to jail after brutally attacking her partner and his mistress. Sent to live in Cell 31, the women there couldn't be more different... they are very religious, sing hymns and discuss the Bible. A fight with a rival cell block starts a bloody and vicious war in the jail... one where the warden and guards seek vengeance on the women with brutal torture and sexual humiliation. When a new inmate arrives and Mayumi recognizes her, all hell breaks loose!
| Directing | Kōyū Ohara | Director |
| Production | Koji Okumura | Producer |
| Writing | Fumio Kōnami | Screenplay |
| Art | Yoshie Kikukawa | Art Direction |
| Directing | Yoshifumi Kamoda | Assistant Director |
| Writing | Mikio Matsushita | Screenplay |
| Editing | Akira Suzuki | Editor |
| Production | Yoshiyuki Kaino | Producer |
| Camera | Shôhei Andô | Director of Photography |
| Sound | Koshiro Jinbo | Sound Recordist |
| Lighting | Shin Shinkawa | Lighting Technician |