From internationally bestselling author Martin Cruz Smith comes an epic story of a physicist, a general, a spy, and a hero who will change history forever.

In a fresh Mexico blizzard, four males cross a barbed-wire fence at Stallion Gate to choose a test site for the first atomic weapon. These are Oppenheimer, the physicist; Groves, the overall; Fuchs, the spy. The 4th man can be Sergeant Joe Pena, a hero, informer, fighter, musician, Indian. These four males—and a solid of troops, roughnecks and scientists—will change history forever.