Tarzan's leadership of the gorilla family is challenged by a young silverback male named Moyo. Moyo wins leadership only when Tarzan sacrifices his in the fight in order to save Moyo's life. The new leader leaves with the gorillas to escape the threat of Histah, a giant python that used to terrorize the gorillas when Kala was young, leaving Tarzan to choose what's dearest to him—Jane or the gorillas.