All of a Sudden (1996)

One day, young merchant Lam Kwok Choi is attacked by a masked robber, who kidnaps his wife Miu Ho Yi and their son Wai Wai during the escape. The robber is named Tsui Jin Peng, because his wife had an affair with Choi. He wanted to beat Choi to relieve his anger, as he hid Yi and Wai on a yacht. Yacht owner Bill discovers Peng’s secret of kidnapping Yi and Wai, blackmails Peng into asking Choi for ransome. On the other hand, the police sent Inspector Mak to handle the case.
This is the only Cat III movie by Irene Wan Pik Ha, a mainstream actress in the mid 90’s in Hong Kong.