Tarzan heads to Guatemala to look for his friend, D'Arnot and helps Major Matling search Mayan ruins for hidden jewels and an idol holding the formula for an explosive. Guatemalan police pursue Alice and Gordon assuming them as spies. Ula Vale as a mysterious figure is revealed in the final episode to be an undercover government operative.
Chapter 2:
Captured by savages guarding the temple which holds D'Arnot and the Lost Goddess Tarzan and Martlings are sentenced to death, while Raglan, who escaped detection, reaches thedome of the ruins.