Chief inspector of Hong Kong’s Criminal Intelligence Bureau, Cheuk Hoi, is suspicious of his close colleague’s mysterious death. Adding to the enigma, he discovers that the five undercover agents who were in constant contact with his dead friend have all vanished.

Michael Miu Kiu-Waias Cheuk Hoi
Benz Hui Siu-Hungas Chum Foon-hei
Moses Chan Hoas Ngai Tak-shun (Victor)
Jessica Hsuan Huenas Sze Ka-lei (Scarlett)
Benjamin Yuen Wai-Hoas Chui Tin-tong
Pakho Chauas Lok Siu-fung
Priscilla Wongas Cheng Suk-mui
Cheung Siu-faias Lai Sir
Charmaine Sheh Sze-Manas Ting Siu-ka (Ding Jie)
Raymond Lam Fungas Sit Ka-keung (Bao Seed)