Several years after his arrest, Sung Tse-ho is offered early parole by the police in exchange for spying on his former boss and mentor, Lung Sei, who is suspected of heading a counterfeiting operation. Inspector Wu, the leader of the task force, wants to mark his retirement with the capture of a ß criminal like Lung. Though Ho initially declines because of his loyalty to Lung, he eventually changes his mind when he discovers that his younger brother, Kit, who is expecting a child along with his pregnant wife Jackie, is working undercover on the same case. While working the case, the two brothers meet and agree to work together. After being framed for murder, Lung seeks Ho's help, who is able to help him escape to
New York City. However, Lung suffers a
psychotic break and is institutionalized after receiving news of his daughter's murder and witnessing the death of a friend. Meanwhile, Ho learns that his deceased friend Mark Lee has a long-lost twin brother, Ken, a former gang member who left Hong Kong as a teenager to travel across America, eventually opening a restaurant in New York City. Ho then locates Ken and enlists his assistance in freeing Lung. Targeted by both assassins attempting to kill Lung as well as American mobsters looking to extort Ken, Ken and a catatonic Lung take refuge in an apartment building where Ken arms himself. During a shoot-out with their attackers, Ken and Lung find themselves cornered; seeing Ken in trouble snaps Lung out of his stupor, and he kills the last of their pursuers. The two return to Hong Kong and regroup with Ho and Kit. The group discovers that one of Lung's employees, Ko Ying-pui, is responsible for attempt on Lung's life and has since taken over the organization in Lung's absence. Lung decides that he would rather destroy his organization with his own hands than let it fall into dishonor and ruin, and the group starts planning to act against Ko. After scouting out Ko's mansion alone, Kit is fatally wounded, but is rescued by Ken, who attempts to rush him to the hospital. Knowing that he will not make it however, Kit persuades Ken to stop at a phone booth to call Jackie, where he manages to name his newborn child Sung Ho-yin ("the Spirit of Righteousness") before succumbing to his wounds. After attending Kit's funeral, Ho, Ken, and Lung take revenge on Ko by attacking his mansion during a meeting with a counterfeiting client. The three manage to kill Ko and many of his men following an intense shootout, but are all critically wounded in the process. Following the shootout, the three men sit down in the mansion and are surrounded by the police forces led by Inspector Wu. Upon seeing the condition of the men, Wu orders his men to stand down, while Ho remarks against Inspector Wu's retirement, as there is "much work left for [him] to do." ==Cast==