John Shaft is the ultimate in suave black detectives. He first finds himself up against Bumpy, the leader of the Black crime mob, then against Black nationals, and finally working with both against the White Mafia who are trying to blackmail Bumpy by kidnapping his daughter.

In the rail yards of Queens, contractors repair and rebuild the city's subway cars. These contracts are lucrative, so graft and corruption are rife. When Leo Handler gets out of prison, he finds his aunt married to Frank Olchin, one of the big contractors; he's battling with a minority-owned firm for contracts. Willie Gutierrez, Leo's best friend, is Frank's bag man and heads a crew of midnight saboteurs who ruin the work of the Puerto Rican-owned firm. Leo needs a job, so Willie pays him to be...