Intruder

Yip Siu-ngan (Sin-Lin Ng) and her husband Kwan Fai (Moses Chan) were wanted criminals in China. Siu-ngan stole the identity of a prostitute called Oi-yee and made use of her travel permit to travel to Hong Kong. In order to get an identity for her husband, Siu-ngan plotted to knock down her client Chan Kai-ming (Wayne Lai) in a car crash. Both of Kai-ming's legs were broken after the crash and making use of the chance, Siu-ngan locked up Kai-ming and killed his mother (Bonnie Wong Man-Wai). She also locked up Kai-ming's daughter Ying-ying (Yuki Lai Yuen-Tung). Meanwhile, Oi-yee's husband Ng Wai-ping (Yuen Bun) learnt Siu-ngan's conspiracy but was soon killed by Siu-ngan's husband Fai who had successfully sneaked into Hong Kong. Ying-ying made her escape and hid herself inside a limestone cave beside a stream. However, she was found by Fai who buried her alive inside the cave. It was when the conspiracy of Siu-ngan and Fai seemed to work out perfectly that torrential rain washed down the body of Ying-ying, unraveling their evil deeds.