Hong Kong action thriller directed by Johnnie To. French pop star Johnny Hallyday stars as Castello, a former hitman suffering from short-term memory loss on account of a bullet lodged in his brain. After a violent mafia attack on his daughter's family in Hong Kong leaves her husband and two children dead, Castello enlists the help of three professional assassins - Kwai (Anthony Wong Chau-Sang), Chu (Ka Tung Lam) and Lok (Suet Lam) - to exact his revenge.