A cloaked figure slips into an exclusive psychiatric clinic and murders one of the female patients. Meanwhile, various sexuals liaisons are revealed. The mystery killer continues with his massacre he beheads a nurse with a scythe, pushes a chauffeur into a spiked “Iron Maiden”, strangles an older female patient, kills …

　　一个女记者为调查小岛女子监狱的黑暗,孤身一人以合理借口入驻此监狱。在这里,她目睹了监狱女犯们的种种不幸和遭遇。有的女犯在别的女犯掩护下,冒死与前来给监狱送工料的猛男火速偷情；有的女犯因不从狱长夫妇的严酷管理,遭到的是更无情的折磨甚至就地QB；有的女犯在没有男性的监牢管制下,自动或被迫与同监牢女犯宣泄肉欲；有的女犯眼看脱逃…