When someone attempts to take out a mob boss named Mr. Lung, his brother Frank (Simon Yam) puts together a team of five bodyguards to protect him. At first the team is bored as nothing happens. After a close call, they pull themselves into a ruthlessly efficient unit.. Slowly, the personalities of the individual bodyguards come to light in snapshot scenes. But when the threat to Mr. Lung is resolved, their troubles really begin. One of them is accused of having an affair with Lung's wife, and the others must kill him or be killed themselves. Director Johnnie To is considered the natural successor to action maestro John Woo..