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 11:
While Martling, Ula and George race in pursuit of Raglan, who is escaping with the precious Goddess, Tarzan, keeping vigil on shore, espies the adventurer ready to boar a mysterious ship...