Summary When the Department of Forensic Science appeals against a traffic accident, Sing Pak presents Po Ying's helmet to the court to prove that her vision is unobstructed after using a waterproof spray in rainy weather, and conducts an experiment to prove that a private car driver was speeding in an analogous traffic accident, which saves the reputation of the Department of Forensic Science. Sing Pak came to Sai Kung for vacation and met Szeto Leung, a former laboratory technician. An incense tree in the village is dumped in a drainage channel. The mayors of the two villages blame each other and ask Szeto Leung to investigate the case, but Szeto Leung accuses SING PAK of the crime. ...... Szeto Leung discovers that someone has uploaded the investigation video onto the Internet, which leads to an interview with a television station.

• Crime