Having survived the assassination attempt at the end of Black Caesar, Tommy Gibbs takes on corrupt New York District Attorney DiAngelo, who had sought to jail Gibbs and his father, Papa Gibbs, in order to monopolize the illicit drug trade. Gibbs decides to eliminate drug pushing from the streets of Harlem, while continuing to carry out his other illicit enterprises. Gibbs falls in love with Sister Jennifer (Margaret Avery), a woman who works with Reverend Rufus, a former pimp who has found a religious calling.
Gibbs and his father have a falling out after Gibbs is told by his enforcer, Zach, that his father ordered the death of Gibbs' ex-wife, Helen. Gibbs and Jennifer move to Los Angeles, leaving Papa Gibbs in charge of the Harlem territory. It is later revealed that Zach himself killed Helen as part of a move to take over the territory, with the assistance of DiAngelo. Gibbs defeats hit men sent to take him out in Los Angeles, while Papa dies from a heart attack while fighting Zach.
Knowing that DiAngelo will be having the New York airports and roads watched, Gibbs flies in to Philadelphia, and then enters New York City on foot in order to carry out a personal war against Zach and DiAngelo.
^Silver, Alain; Ward, Elizabeth; Ursini, James; Porfirio, Robert (2010). Film Noir: The Encyclopaedia. Overlook Duckworth (New York). ISBN978-1-59020-144-2.