Chow Yeung

From a conservative family background, Law Ka Sing hides his homosexual identity in an attempt to conform. Sunny, Sing's boyfriend for eight years is just the opposite, and lives his life out of the closet. Although he deeply loves Sing, he is unwilling to part with the colorful night life, which is in extreme contrast with Sing. Sing's father is also constantly rushing him to marry, and Sing's "girlfriend" Chuen is returning to Hong Kong from Canada and requesting for him to choose between his real or fake lover.

"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.