See piu fung wan (2010)

A powerful triad boss has been kidnapped, and the new police superintendent Koo (Fala Chen) decides to recruit the help of Mann (Simon Yam), a former supercop who has since been relegated to back-up duty. Mann has his work cut out for him when he realizes his opponent is Sam (Michael Miu), a former cop with plenty of grudges. When Sam takes the fight to Mann’s family, Mann is more than determined to bring down the dangerous kidnapper and his gang.