Tiger Cubs

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 Yun as his best partner at work and a good brother, but to his surprise, his girlfriend Ding Wai Wai falls in love with the optimistic Cheuk Yun and wants to break up with him. To maintain the brotherhood, Cheuk Yun asked his colleague So Man Keung to pretend to be his girlfriend, which began a mess in the relationship.
Meanwhile, the police were informed that the king of thieves, To Tin Yue, was planning a large-scale robbery of the treasury. Hon Tou and OCTB inspector Chong Cheuk Wah jointly set up an operation to capture Tin Yue. Cheuk Wah is Cheuk Yun's elder sister and has a snobby personality. She only cares about her work day and night because she cannot forget the pain of her boyfriend's murder. As Hon Tou gets to know Cheuk Wah, he slowly realizes that he and Cheuk Wah are actually similar people, and his feelings start growing...