A part-Indian mining engineer looks for gold in an Arizona ghost town with his socialite bride.
A gang of bandits takes control of Tucson in preparation for the arrival of a consignment of gold, with only a band of voluntary soldiers trying to outwit them and save the town.
Mountie Matt O'Brien is assigned to escort Miss Owens to a remote outpost. But when he finds an illegal mining operation there that is smuggling gold across the border, his superior Sgt. Means orders him to leave.
While the Civil War rages on between the Union and the Confederacy, three men – a quiet loner, a ruthless hitman, and a Mexican bandit – comb the American Southwest in search of a strongbox containing $200,000 in stolen gold.
Two jobless Americans convince a prospector to travel to the mountains of Mexico with them in search of gold. But the hostile wilderness, local bandits, and greed all get in the way of their journey.
Sgt. Renfrew and Constable Kelly go aloft to search for a plane missing with a shipment of gold from the Yukon Mine Company. Inventor Speavy has devised a power ray which disrupts electrical impulses, and Morgan and his gang of crooks has brought in Prof. Lewis to increase the ray's range, telling him he's helping the government develop this new weapon. Speavy spills the beans to Prof. Lewis and his daughter Madeleine,and Morgan threatens to implicate them in his crimes unless they cooperate. Morgan kills Speavy when he tries to warn Renfrew, but when Madeleine stows away on board the doomed plane Renfrew is piloting, will the crooks be able to make Prof. Lewis use the power ray to bring the plane down?
In the latter half of the 19th century, gold is discovered in the Black Hills, sacred land of the Lakota people. Gold diggers, profiteers and adventurers flock to the region. Among them is the hard-hearted land speculator Bludgeon, who tries to expel the Lakota using brutal methods. Lakota warriors retaliate, and soon the gold diggers' town becomes a battlefield.
In order to make Tug Cardwell (William Phipps) sign over his rich gold claim to them, John Avery (Robert Shayne), Gypsy Avery (Veda Ann Borg) and Jackson (Marshall Reed) hire Bob Rankin (Douglas Fowley') to kidnap Tug's sweetheart Jane Whipple (Elaine Riley). Rankin hides Jane and then demands half the mine from the other crooks. Dave Saunders (Tim Holt) and Chito Rafferty (Richard Martin), friends of Tug's, find Jane and taker her to safety. The conspirators then shoot Rankin, capture Tug and force him to take them to his claim. Dave and Chito are close behind.
With a heavy haul of 250 kilograms of gold bullion, the grizzled criminal mastermind, Rhino, and his ruthless gang of cutthroats, head to a ramshackle retreat somewhere in the Mediterranean to lay low on a scorching day of July. However, the unexpected and rather unwelcome arrival of the bohemian writer, Bernier, his muse, Luce, along with a pair of no-joke gendarmes further complicates things, as the frail allegiances will soon be put to the test.
After striking gold in Alaska, the romantic George sends his womanizing partner Sam to bring his fiancée up from Seattle. When Sam finds that she has already married, he returns instead with Angel, a dancer originally from France.
A widow hires an ex-gambler to retrieve gold bars from a sunken river boat in Colorado and discreetly return them to the Federal Mint, from where they had been stolen by her dead husband.