Yan Zilang is an internationally acclaimed conductor working in the United States. After his former teacher inherits a group of problem students, Zilang returns to Hong Kong to assist with training them. Although it won’t be an easy task, Zilang is prepared to do everything he can to help the kids find their voices.
Liu Yue Ping reports to the ICAC about a rich 2G Cao Yuen Yuen who bribed officers of the Hong Kong Correctional Services (HKCS) from inside the prison. William Luk decides to infiltrate the prison as an inmate to conduct his investigation, while his partner Ching Tak Ming and Chief Inspector Lau Po-keung back him up from the outside.