Thomas Hoshino (Willson) is a tough Japanese detective, who lost his partner by a deadly Yakuza killer Jaho (Lew). He tracks down the killer and his master to Los Angeles, where he teams up with Det. Karen Ryder (Farrell). Soon they discover that Yakuza prepares a gang war and weapon smuggling. Hoshino must find a way to defeat the killer who posses mystical ninja powers.
Based on the true life experiences of poet Jimmy Santiago Baca, the film focuses on half-brothers Paco and Cruz, and their bi-racial cousin Miklo. It opens in 1972, as the three are members of an East L.A. gang known as the "Vatos Locos", and the story focuses on how a violent crime and the influence of narcotics alter their lives. Miklo is incarcerated and sent to San Quentin, where he makes a "home" for himself. Cruz becomes an exceptional artist, but a heroin addiction overcomes him with tragic results. Paco becomes a cop and an enemy to his "carnal", Miklo.
A former cop's ex-wife marries a stockbroker, who it turns out has cheated the Mafia out of a large sum of money. They kidnap the wife to force the husband to pay the money back. The ex-cop has to rescue her.