Colour of the Truth

Wong Jiang and Seven-Up are good friends who serve on the police force. Unknown to honest cop Wong, however, Seven-Up is a corrupt police officer who has ties to the underground. During a particularly big stake-out, a showdown leaves Seven-Up dead. His son, Coke, is told that Seven-Up died at the hands of Wong and returns years later to avenge his father, opening a trail of deceit and double-cross.
(Source: AsianWiki)