In 1860, the only Pony Express job 13-year-old Will Cody could land was the "sweat and water run," taking care of the tired and thirsty ponies. But one chilly November morning, Will has his big chance. The news of the U.S. presidential election has been entrusted to the pony boys, and from the looks of it, only Will would be able to get the mail through. But should he risk his own safety and the wrath of his boss, the Terrible Slade, and ride himself?