Directed by Edward A. Kull, Wilbur McGaugh | Starring: Bruce Bennett, Ula Holt, Ashton Dearholt, Lewis Sargent

A serial in 12 chapters. Tarzan goes to Guatemala to find his lost friend, D'Arnot. On the way he helps Major Matling search Mayan ruins for hidden jewels and an idol containing the formula for a powerful explosive. D'Arnot and the idol are rescued, but the idol falls into the clutches of the explorer Raglan.