On Oakland's waterfront, a bitter turf battle is being played out between Asian and African American crime families. When the Asian warlord's son, Po (JON KIT LEE), is found dead, the gang war escalates to new heights. News of the murder eventually reaches a Hong Kong prison holding the victim's brother, Han (JET LI), a former cop who took the rap so that Po and their father, Ch'u Sing (HENRY O), could escape to the U.S.
Now, Sing and his right-hand man, Kai (RUSSELL WONG), control a powerful Asian crime family that's hostile to the local African-American crime family run by Isaak O'Day (DELROY LINDO). Although Isaak eventually wants to get into a legitimate business with his son, Colin (D.B. WOODSIDE), and an ambitious businessman, Roth (EDOARDO BALLERINI), he must first contend with allegations that his people were responsible for Po's death.
Thus, his right-hand man, Mac (ISAIAH WASHINGTON), is put on notice, as is Maurice (ANTHONY ANDERSON), a portly and bumbling fellow assigned to protect Isaak's adult and very independent daughter, Trish (AALIYAH), who wants nothing to do with her father's illegal business activities.
With Han arriving in the U.S. and repeatedly running into Trish, and more members of each crime family being murdered, the two young members of the opposing families try to figure out what's going on and determine exactly who's responsible.