expensive ( Wong Hei ) and the beginning of the school is selected as an undercover to collect incriminating evidence of a crime syndicates . Met during the Malaysian new actress Qin ( Gigi Fu ) and the Witness Protection Unit officers Bo ( Marco Ngai ) . After your completion of an undercover mission , was transferred to the Witness Protection Unit as a partner with Bo , the two fight each other and work together to protect the witness of a murder case ( Guoqiang ) . Chinese surface as a legitimate businessman , but in fact evil . When the Chinese aware of your desire to expose their crimes , will be everywhere and , in addition to the destruction of their love affair with the piano , also makes him and Bo misunderstanding your feel a helpless against him . After your ironed out with Bo , and then work together to pursue to get China 's evidence, Hua Mei Chi ( Tang Po such ) Taiyimieqin testify , eventually the Chinese rope .