Mao, a government agent working for an unofficial investigative unit, spends six months gathering intelligence on a drug trafficking operation. She infiltrates an abandoned factory where the deal is set to take place, but loses contact with headquarters and her subordinates are taken hostage. When she attempts to infiltrate again, she is captured by the enemy, raped, and drugged. Subjected to relentless torture including vibrator abuse and gang rape, Mao is pushed to the brink both mentally and physically. As her body and mind break down, Mao...