Si ren bang zhi qian wu gou xi

Cheung is in an unhappy marriage. He works with his wife at a local barbecue restaurant and she takes every opportunity to belittle Cheung and use him for his money. To make matters worse, Cheung isn't able to satisfy his wife in the bedroom. One day his wife's cousin, Fung, arrives in Hong Kong from mainland China and Cheung and Fung instantly form a connection. Fung isn't like his wife, she is respectful and treats him well. Cheung tries his best to not give in to temptation, but eventually he is overcome with desire, and he and Fung start a secret relationship behind his wife's back. However, Cheung soon finds himself way in over his head when he discovers that the mild mannered Fung is hiding a dark and grisly secret. (Vinegar Syndrome)