Title: Twilight Investigation – 囧探查過界

Private agency owner YIP KWOK-CHEONG (Shek Sau) is a retired police officer. His three employee investigators are vastly different in terms of personality; CHOW KA-SING (Raymond Wong) is obsessed with fashion; WONG SIU-FU (Johnson Lee) is a city slicker; and finally KAY ON-KUI (Wong He) his most dependable investigator.
CHEONG thinks very highly of KUI who has a meticulous and analytical mind. He is able to crack even the most difficult cases. KUI meets model CHUNG YEE-TAK (Linda Chung) while investigating an adultery case. TAK comes from a single family and is often down on her luck when it comes to men and career development.
After a near-fatal drunk driving accident, the idea of looking for her mother who left her family many years ago resurfaces. She turns to KUI for help. A subtle chemistry sparks between them during the investigation. Later, KUI discovers a secret that even TAK never knew.