 In the 12th of the "Jungle Jim" series from Sam Katzman s production unit at Columbia, Jim (Johnny Weissmuller) is assigned to accompany a government agent into the interior to get the native s approval for copper mining. Unknown to Jim, Arco (Robert C. Foulk), also wants approval but for oil, not copper. Arco and his henchies make a series of raids on the villages which he is able to blame on Jungle Jim.