Lee Ying, who is the chief inspector of Regional Crime Unit, is newly promoted to Royal Hong Kong Police Cadet School as Deputy Commandant. He confronts a group of youngsters of different social backgrounds, turning them into self-disciplinary and self-contained young men.

Commander Lee Ying
Mdm Tong Suk Yee
Office Alan Chung
Nick Cheung
Wong Wai Kit
Kit's Father
Fai's Mother
Mr Tsang
Sgt Wong
Sgt James