Inspector Karl (Louis Koo), the eponymous inspector who pays a visit to the opulent Kau family estate, where things are not as rosy as they appear. Family heads Mr. and Mrs. Kau (Eric Tsang and Teresa Mo) are prepping an engagement party for their daughter Sherry (Karena Ng), who's soon to marry handsome businessman Johnny (Hans Zhang). Alas, Inspector Karl informs them that a young woman named Cindy Cheung (Chrissie Chau) has been found dead of an apparent suicide, and he's got some questions for Mr. Kau...