Western legend Luke "Tomahawk" Callahan agrees to lead one last wagon train across the Mexican border—where revolution is brewing, bullets are flying, and all roads lead to death....

With just a single journey under his belt, first-time wagoneer Tomahawk Callahan became a national hero. It started as a challenge waged by a railroad mogul—a race between an old-time wagon train and a brand-new rail line—with the whole world watching. Against all odds, Tomahawk led his family business to victory. At the time, he thought it would be his first—and last—wagon train. But at his sister's urging, he's agreed to take on one final job, a never-before-attempted trip across the Mexican border....

But Mexico is undergoing bloody changes. After a brutal coup, General Porfirio Diaz is determined to bring "order and progress" to the country—while revolutionaries plot against him. Tomahawk's wagon train could help modernize Mexico, bringing railroad workers, miners, and supplies—across a desert full of rattlesnakes, Apache, and other threats. The deadliest of all is a former priest known as Generalissimo “Padre” Rodriguez, who has his bloodthirsty sights set on the wagon train. Tomahawk's got to drive his wagons out of this frying pan and into the fire—or they'll all end up on a wagon trail to Hell....