Shaft in Africa (1973)

At home in his New York City apartment, John Shaft is drugged with a tranquilizer dart, then kidnapped and persuaded by threats of physical force, the promise of money, and the lure of a pretty tutor to travel to Africa, assuming the identity of an indigenous language-speaking itinerant worker. His job is to help break a criminal ring that is smuggling immigrants into Europe, then exploiting them. But the villains are tipped off that he is on his way.

Shaft initially passes a test before being hired for the job; the test involves him surviving in a small, overheated room without water, and a floor covered in deep sand, mimicking the supposed conditions of Africa. Shaft covers himself with the sand, thereby avoiding heatstroke and winning the contract from his new employer. Shaft then embarks on a mission to infiltrate and destroy a human trafficking and slavery ring in Africa and France.