 Eddie Cusack is a tough Chicago policeman facing two crises stemming from a bloodily botched narcotics sting. The first involves a war that ensues between the gang of Tony Luna and Felix Scalese against Columbian "businessman" Luis Comacho, a war that sweeps up Tony Luna s daughter. The second involves Cusack s new partner, Kopalas; during the botched sting Kopalas witnessed another cop, a burned-out alcoholic named Craigie, shoot and kill an innocent youth then plant a gun on the youth, and Kopalas is torn because he fears breaking the code of silence that exists among his fellow Chicago cops - a code of silence that sweeps up Cusack when, at a civilian review board he testifies against Craigie, and is abandoned by his fellow cops when Luna s daughter is kidnapped by Comacho, Cusack is badly beaten by Comacho s gang, and Cusack must settle the gang war (and rescue the girl) once and for all with a "borrowed" robot police tank.