COMA (1981)

Lee Ting-hong joins Guangji Hospital, where he meets the chairwoman's daughter, Xue Baoqi. They initially misunderstand each other but eventually become a couple. As they witness patients, and even acquaintances, die mysteriously, they investigate and discover that the events are related to the hospital's director, Tang Zhiyang, and the chief surgeon, Guo Weicheng.