In Chicago in the 1930s, the prohibition of alcohol sales became an extremely profitable business. The gang leader Capone used violent means to control the smuggling wine market and committed numerous crimes. The new federal official, Nass, was determined to crack down on alcohol smuggling, but his first operation failed because he leaked the information. Under the leadership of the veteran police officer Ma Long, Nas rebounded and formed an action team.
Nas destroyed Capone's underground warehouse and refused Capone's bribe. The evil Capone threatened Nas. But Nas did not compromise, and seized Capone's smuggling convoy at the border, and captured one of Capone's important men. Malone tried to force him to agree to be a witness against Capone, but in the elevator outside the court, both the witness and a member of the action team were assassinated by Capone's men.
Angry Nas went to find Capone to settle the account, but was stopped by the experienced Malone. Malone got the intelligence from the chief of police who had colluded with Capone. However, just as Nas went to Ma Long's house, Ma Long was dying of life because of being attacked by Capone's killer. According to the clues left by Malone, Nas and others went to the station to ambush. After a gun battle, Nas caught Capone's bookkeeper. When Capone was charged with tax evasion, Capone's men tried to take action again, but Nass found out. After some effectiveness, Nas got rid of the killer. He not only avenged his friends, but also got a list of Capone's bribes. In court, Nas skillfully convicted Capone.
