Using the political decline of Northern Song dynasty as the background, this is the story of the Four Great Constables upholding justice while punishing the wicked.
as Heartless / Shing Ngai-yue / Mou Ching
as Song Zhi-yin
as Iron Fist / Tit Yau-ha / Fok Yi
as Lam Ruo-fei
as Chaser / Tsui Leuk-sheung
as Teet Yau-Tung
as Cold Blood / Lang Ling-hei
as Ling Siu Dou
as Chukot Ching-ngor
as Piu Suet
as Kuk Yin Hung
as Lam Po-tian
as Ling Lok-shi
as Ling Siu-kwat
as Choi King
as 大理寺卿
