Time is a measure of duration, not a barrier or obstruction. The Wattson Brothers Go West follows teenage brothers William and Bob Wattson, scions of a huge fortune, and how they spend a summer break. Their holiday begins with them traveling from their New Hampshire school to their late father's unique mountain home near Jackson Hole, Wyoming. Located there is another part of their inheritance, a machine able to transport people through time. They are joined by two schoolmates, southerner Ellie and New Yorker Paul. Then it's on to 1805 Big Sky Montana where a fifth crew member is added, a young Crow brave, Spear. They travel along the scenic Missouri River then down to the future home of Yellowstone National Park. They pass through the wonders of Yellowstone and fly east, arriving back in Montana. Among the sights they see are thousands of buffalo and millions of now-extinct passenger pigeons. During their travels, they encounter the Corp of Discovery and Meriwether Lewis. Also, they find there is a rival time machine, with a villainous crew, from 1945 Germany. They are confident they will see these guys again. It's the adventure of a lifetime, perhaps the first of many.