 Jill Young has brought up her pet gorilla since she was a child. Twelve years later, when the gorilla is fully grown, Hollywood promoter Max O Hara travels to Tanzania, Africa, and convinces Jill to bring her extraordinarily large gorilla, Joe, back to America. While in Hollywood, Joe is used in a stage production and is exploited to no end. It doesn t take long until Joe is sick of being mistreated and he escapes to run loose in civilization.