Keung, a tenacious and determined young man, defends and rescues Teresa—the daughter of a wealthy merchant named Tu—from being kidnapped by a gang of criminals led by Li Ming. This makes Li Ming his bitterest enemy. Meanwhile, a police officer named Chao is investigating a gold smuggler and decides to infiltrate the gang by posing as a ruthless killer. It is then that he meets Li Ming, who hires him and tasks him with killing Keung.