The plot of Brother of Darkness, a 1994 Hong Kong romance crime action adult intimacy film, sticks to the tried and tested 'TRUE CRIME' narrative, with a young man called Toh (吳岱融 Ng Toi Yung) on trial for the murder of his brother Wah (何家駒 Ho Ka-Kui), the reasons for which are revealed through confessions and flashbacks.
Toh is on trial for the murder of his brother, Wah. As the court case unfolds and witnesses take the stand, a horrific tale of sexual abuse, sibling mistreat, domestic violence and all-round thuggery ensues. An attack leads to castration and the end of Toh's relationship with his long-term girlfriend Jenny (鍾淑慧 Lily Chung Suk Wai).
Wah is forever after money to finance his gambling and drug addictions. When Toh returns home just in time to rescue Jenny, and it is the last straw ...... !!!