John Zinga, a descendent of slaves, has an ancient medallion around his neck and a fragment of song passed down generations. He is an English dockworker with a magnificent voice and a yearning to learn his roots.

• Hammer Film Productions
• British Lion Films
• Paul Robeson
• Elisabeth Welch
• Esme Percy
• Robert Adams
• James Solomon
• Tony Wane
• Ronald Simpson
• George Mozart