Desc: Sang sei sin: Directed by Po-Chih Leong. With John Sham, Hoi-Lun Au, Timothy Zao, Ching-Yuen Tse. Mr. Cheung takes six young students along for a trip to a remote, deserted island. After being dropped, however, they discover there are more people living on the island: three insane persons and their paranoid mother.