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.
Singing Marseilles docker Joe is hired by wealthy English couple, the Oliphants, to find their missing son Gerald. When Joe finds him, he learns Gerald escaped of his own will and takes him to stay with a local singer, who offers a refuge from his repressed white parents.
A newspaper reporter sets out to track down the murderer of a policeman.
