Watch Mandingo for Free: How to Stream the Movie Online at 123Movies. . Warren Maxwell, the owner of a run-down plantation, pressures his son, Hammond, to marry and produce an heir to inherit the plantation. Hammond settles on his own cousin, Blanche, but purchases a sex slave when he returns from the honeymoon. He also buys his father a new Mandingo slave named Mede to breed and train as a prize-fighter.