One of Paul Robeson’s most dramatic roles as a man who follows his African roots and becomes a tribal chieftain. In 1700 on the island of Casanga, off the west coast of Africa, the tyrannical rule of Queen Zinga oppresses a tribe. An heir to the evil Queen’s throne flees with a medallion, which signifies the birthright of the ruler. Now, in the present, John Zinga, a dock worker wears this medallion. His great voice impresses Gabriel Donizetti, the opera impresario, and under his training, John becomes the sensation of the London Opera. A world traveler recognizes a song that John always instinctively sings and tells John it is the “Song of Freedom” from the Island of Casanga. John and his wife Ruth goes to Casanga to take his rightful place. His efforts to rid his tribe of disease and superstition brings the wrath of the Witch Doctor, who convenes a tribunal that is violated by Ruth. The Witch Doctor tells John that if he is truly the King, he must carry out the tribal punishment of Death. When John, in desperation, sings the Song of Freedom, the Witch Doctor’s evil influence is broken and the tribe realizes that the Queen of their King must not be killed.