Inspired from a true story, Hitman Zhang Ning gets more than he bargained for when he is hired to kill a gangster, and is soon running from bounty hunters.

Four proficient detectives are assigned to track down a murder suspect who has fled the city with his girlfriend.
The trail leads them to a desert where they soon find themselves in hot water as the suspect has hired two top drawer professional assassins with far deadlier skills than their own.