Resort Massacre (2000)

Mentally disabled Joey is now over thirty and running the Sunshine Resorts inn with his elderly mother, Mrs Lim. He had his eyesight damaged as a child staring at an eclipse in Cheung Chau; but he likes to listen, recording his violent Uncle Hoi having sex. Women have been going missing after renting room thirteen at the inn, presumed suicides. But Joey knows better. Mayse, a journalist out of place at a trashy magazine, is ordered to investigate but sends Julie in her place. When Julie cant be reached for two days, Mayse heads to Cheung Chau herself to solve the mystery.