A killing spree takes place in a northern China's hospital, an old elevator goes to the 18th floor - underground.
Robert Lin
Dr. Zhang Tiankai
Cai Hongxiang
Old Hu
Yang Qing
Head nurse Ma
藍正龍
Dr. Lin Fei
周秀娜
Bai Jie / Dr. Ye
謝君豪
Dr. Ouyang
杨青
Nurse Ma
