Joe

A young detective in the Yau Ma Tei police station.
He is not afraid to speak up to senior detectives, and he has great respect for his boss, May.
He has the footwork to dig up a crime scene after reading a post on a social networking service.
As a result, he discovers a skeleton, but the autopsy results are falsified.
This leads May to invite him to join Leung's information concealment investigation team.