A young couple die in a plane crash in the jungle. Their son is found by Tarzan and Jane who name him Boy and raise him as their own. Five years later a search party comes to find the young heir to millions of dollars. Jane agrees, against Tarzan's will, to lead them to civilization.

• Metro-Goldwyn-Mayer
• Johnny Weissmüller
• Maureen O'Sullivan
• Johnny Sheffield
• Ian Hunter
• Henry Stephenson
• Frieda Inescort
• Henry Wilcoxon
• Laraine Day