In the third and last in the original Shaft (1971) series of action-packed "blaxploitation" pictures, private eye John Shaft (Richard Roundtree) travels to the "motherland," where he breaks up a modern slavery ring. Shaft is hired by a diplomat, Emir Ramila (Cy Grant), to infiltrate the criminal empire of the evil Vincent Amafi (Frank Finlay), who is kidnapping poor Africans and shipping them to Europe as slave laborers. Amafi murdered Ramila's son when he attempted to expose the illegal operation, and Ramila, now aware that his investigation of Amafi has been compromised, needs an unfamiliar to face to help bring the ring leader down. After undergoing some training at the hands of a comely tutor so that he'll be able to pass muster as an African, Shaft travels to Ethiopia and allows himself to be shanghaied by Amafi's men. However, the high-ranking Wassa (Debebe Eshetu) is the traitor in Ramila's ranks, and he has betrayed Shaft. As the tough private eye attempts to free the slaves being held captive in a former Nazi prison below a French chateau and bed any beautiful women who crosses his path, he must also dodge a series of assassination attempts by Ramila's men.