The forensics team and the crime team on Hong Kong's police force are challenged once again as the squad is staffed with new personnel. This time, the crime-solving police force led by Go Sir, Dr. Man, and King Sir, who all work together with their respective teams to solve murder mysteries.

• Raymond Wong Ho-yin
• Selena Lee
• Alice Chan Wai
• Shaun Tam Chun-Yin
• Rebecca Zhu Chenli
• Fred Cheng Chun-Hung
• Roxanne Tong
• Yumiko Cheng Hei-Yi