Isle of the Damned plot
"Savage cruelty was their culture... human flesh was their food!"
Private detective Jack Steele is hired by a mysterious treasure hunter to find Marco Polo's lost treasure. Jack's adopted son is also present. Their search takes them to an island off the coast of Argentina...and there they fall into the hands of a primitive tribe of cannibals, the Yamma Yamma. Alexis Kinkaid, a mysterious hermit who lives on the island among the cannibals, can help them unlock the secret of the island, but don't let them end up in some cannibal's stomach.