Johnny Weissmuller fights enemy agents who are trying to steal cobalt while disguised as crocodiles.

Johnny Weissmuller is called in by the government to investigate thefts of cobalt from a jungle mine owned by John King and his ward, Luora. He discovers natives led by King and Luora, who are selling the cobalt to a foreign government, are responsible. John's brother, Arnold King and Johnny are captured and doomed by the natives...—Les Adams <[email protected]>