Lau Ching-wan
Since this case is serious, Ka-fai and his colleague Mei-san (Ngai Suet) were transferred to the Regional Crime Unit to assist in investigation, where they collaborate with Inspector Lau (Sean Lau) and Ma (Bryan Leung), whom are frenemies. First, they investigate the armoured truck guards before finding clues that lead them to a karaoke bar, where Ka-fai falls in love with an innocent singer named Man (Fennie Yuen). Soon later, Ka-fai found clues about the hijack case from Man, who turns out to be Hon's girlfriend.