"Detective Investigation Files" revolves around the professional and meticulous investigations carried out by a group of dedicated police officers. As they delve into mysterious deaths with unclear causes, they tirelessly work towards maintaining peace and security for the people. However, their demanding job often comes at the expense of personal happiness.
Cheung Dai Yong, a brilliant and astute police officer, has a track record of solving crucial cases. His trusted colleague, Lee Chung Yee, stands by his side, and together they tackle challenging and complex cases. Amidst their work, Dai Yong encounters Ko Jit, a tenacious journalist. Despite their initial conflicts, a deepening connection blossoms between them. However, Ko Jit already has a romantic partner.
古天樂
as 徐飞 Tsui Fei
Jessica Hester Hsuan
as 武俏君 Mo Chiu Kwan (Queen)
陳錦鴻
as 江子山 Kong Tze San
佘詩曼
as 文婉兰 Man Yuen Lan (Man)
李珊珊
as 唐心如 Tong Sum Yu
邵美琪
as 江子青/江子瑶 Kong Tze Ching / Kong Tze Yiu
戴志偉
as 邱彼得 Yau Bei Dak
郭鋒
as 梁剑雄 Leung Kim Hung
蘇志威
as 韩国仁 Hon Kwok Yan (Korean)
姚瑩瑩
as 邵之蓝 Siu Chi Nam (Gigi)
Timothy Cheng Chi-Sing
as 刘建生 Lau Kin Sang
向海嵐
as 梁芊芊 Leung Chin Chin
