Crooked lawyer Steve Gentry (Douglas Fowley) has plans to take over the town and mines of Silver City from Jim Mason Frank Matts). He kills Mason in what looks like a mine accident.
A group of travelers find themselves marooned on an island with a maniacal self-made ruler.
The Vegas own an oil rich ranch and Calhoun is after the mineral rights. He gets Carlos Vega to run huge gambling debts. When Carlos' sister who is half owner arrives, Calhoun tries to have her killed. Roy finds a clue and this leads him to Calhoun's offshore gambling ship.
An expedition into the deep jungle discovers a native tribe led by a tall white blonde woman.
