Tarzan and N'kima follows a boy named Kimo of Nolangi into a crater that leads him to the Land of Darkness with a plan to unite both tribes upon speaking to King Mavor. With help from King Mavor's daughter Nina, Tarzan plans to help Kimo make peace between both tribes while evading the dangers of the prehistoric land of Pellucidar in order to get King Ovan of Nolangi and King Mavor to understand the peace between the tribes.