Hui is the struggling proprietor of a Cantonese BBQ roast duck restaurant in Hong Kong. At the beginning of the film, Hui is visited by a health inspector, who finds a cockroach in his soup and other unsanitary conditions, and threatens to sue the restaurant. However, Hui's staff stop the inspector from leaving with evidence, allowing Hui to continue running the restaurant. While the restaurant is operated on the ground floor, Hui lives upstairs with his wife and son. He receives a visit from his rich mother-in-law, who is convinced that her daughter, Ah Kuen, has married a good-for-nothing.