A British spotter pilot is forced to land his plane in a open area surrounded cby jungle and is soon captured by unfriendly natives. At the same time, not far away, Tarzan and Bertha Kircher are building a protective boma in the jungle in order to get a peaceful night's sleepm while traveling back to British HQ where Tarzan hopes to turn her in as a spy. 

They both discover the other can speak English, and so begin to converse with each other.  She is soon confronted by Kublat.