In a tea house in Hong Kong, HKPD Inspectors "Tequila" Yuen and Benny Mak attempt to arrest a group of gun smugglers while they are making a deal. After an ambush from a rival gang member, a fierce gun battle breaks out. The gangsters are defeated but several police officers are badly wounded and Benny is killed. Angered by the death of his partner, Tequila shoots and kills the gangster who ambushed them at point-blank range rather than arrest him, much to the chagrin of his superintendent Pang, who wanted the gangster alive to testify. Tequila is subsequently ordered off the case for his misdemeanor.