When Jem is caught in a miners’ riot, he learns the worst: the Midas mine has run out of gold. Will, the mine owner’s son, tells Jem the only way to get the Midas working again is to blast deeper for a new vein. To do so, a nearby abandoned mine must be reclaimed for an air shaft. Trouble is, the Chinese are working that old mine and have no intention of giving it up. Temper flare, and Jem’s sheriff pa is dragged into the middle of it.