Dr. Gao Jing and her fiancé Chen Guo Dong go on a diving trip to visit an ancient city, but the holiday becomes nightmare. After some terrible incident, Guo Dong’s body is found headless, and Gao Jing cannot remember what happened to them underwater. Gao Jing tries to find out the truth with the help of her friend, the hypnotist Dr. Tong, and her own patient Simon who claims to be able to see spirits.