The story picks up with the Clayton family, Tarzan, Jane Porter and their son Korak, returning from their adventures in the previous novel (#8). Along the way they find an orphaned lion cub, which Tarzan takes home and trains.Flora Hawkes, a previous housemaid of the Clayton's had overheard of Tarzan's discovery of the treasure chamber in the lost city of Opar (from The Return of Tarzan and Tarzan...