A valuable ruby disappears during an earthquake. Professor Ferlach is tasked with excavating the buried temple. Mysterious things are happening during the excavation and strangers are trying to stop them. The archaeologist Prof. Ferlach gets unexpected help from the animal catcher Larry Stone and his daughter Helga, who actively help with the research and excavations.

Lex Barker
as Larry Stone

Ann Smyrner
as Helga Ferlach

Hans Nielsen
as Professor Ferlach

Eleonora Rossi Drago
as Maharani von Tungal

Maurice Ronet
as Dr. Gérard Rinaldi

Magali Noël
as Gaby

Franco Fabrizi
as Manuel Da Costa

Peter Carsten
as Hermann