May 7, 1944. In the dark of predawn, across the Mexican border and into the sleepy, sparsely populated desert lands of the American Southwest rolls a convoy of military vehicles - half-track trucks, troop trucks, and tanks. The very few people awake to witness it assume the armored detail is an American Army recruiting drive out of Fort Bliss. In fact, it is Operation Shatterhand, the master plan of a German officer who intends to conquer the Americans by dividing them in their own land. When word reaches the government of the invading Germans, FDR wants the incident handled quietly, lest the American populace panic. Suddenly it is up to a handful of Indians - Navajo and Hopi, hereditary enemies - to find a way to stop the German incursion. The Indians lost America once. They are not about to lose it again...