"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.
Louis Koo
Jessica Hester Hsuan
Sunny Chan Kam-Hung
Charmaine Sheh
Lee San-San
Maggie Shiu
Andy Tai Chi-Wai
Samuel Kwok Fung
Edmond So
Eileen Yeow
Timothy Cheng Chi-Sing
Anne Heung Hoi-Lam
Catherine Chau
Edward Mok
Henry Lo Chun-Shun
Cecilia So Yan-Chee
Safina Lam