The 18-year-old Jasper only did a little business of breaking and selling stolen goods for the gang boss, until he got to know the owner of the call station, turned to a groom and sold drugs, and finally brought his own brother into the business. However, the old gang did not let him go, and the new gang forced him to take revenge with a gun. When he realized that everything was Infernal Affairs and was eager to escape, he found that his younger brother was used to the cold-blooded ruthlessness and rich sweetness of the underworld, and insisted that he would not let go. Simple character scenes, too busy to give the fierce rhythm, not only the traditional gangster theme into the family struggle, but also sprinkle the director's talent.