Leung Chiu-Yee

Chan Wing Yan, a young police officer, has been sent undercover as a mole in the local mafia. Lau Kin Ming, a young mafia member, infiltrates the police force. Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, respectively, race against time to expose the mole within their midst.

High Court Judge Yin Wai-chi sacrifices her prestigious career to become a Juvenile Court judge, dedicated to redeeming delinquent youths and upholding justice.