The story begins two years after the conclusion of the previous book, around 1913, when Tarzan is 24 years old. Tarzan (Lord Greystoke) and Jane have had a son, whom they've named Jack. Tarzan has spent much time building an estate home on the Waziri lands in Uziri, Africa, but has returned to his ancestral estate in London for the rainy season. Tarzan's adversaries from the previous novel, Nikolas Rokoff and Alexis Paulvitch, escape prison and kidnap the Greystoke heir...