Serving on the Special Duties Unit (SDU) for many years, "devil" instructor Jin Hon Tou is seen as a hero in the hearts of his subordinates. His style is strict and serious, and he has high expectations of his subordinates, especially the two new SDU members, You Hok Lai and Yau Chun Hin.
However, when he's off-duty, Hon Tou is actually a very caring big brother. Hon Tou thinks of Chong Cheuk
