Tarzan and the Spider People

After stopping a stampede of elephants, Tarzan learns from Tantor that their stampede was caused by the appearance of giant spiders who have been abducting some of the elephants. When he follows the giant spiders to their city at the top of two large trees, he discovers that the giant spiders are actually machines piloted by the city's inhabitants who are sorted into workers and scholars when he meets a female worker named Ara. Upon being brought to the lead scholar Ziller and told about his kind abducting elephants, Tarzan and Ziller are then told by the worker leader Rachnid that he and the other workers plan to use the elephants for their labor in order to make the workers' rooms the same as the scholars' room.