In the summer of 1882, our brave explorer Truman sets off on his most thrilling adventure yet. All aboard a train heading west, we join Truman as he journeys to a place that many say doesn't exist. Folktales and legends tell of a canyon that is "a mile deep and ever so wide." Misfortune soon meets Truman as he finds himself, and his trusty horse Jasper, lost and all alone in a dry and rugged wilderness. As he makes his way back to Ma and Pa, Truman takes us through the major sites, and eye-popping vistas, of Grand Canyon National Park.

This time, we ride the swift-moving current on a raft through "Hance Rapids", see the jaw-dropping "Ooh Aah Point", become amazed by "Bright Angel Canyon", look up at the "Granite Gorge", meet a one-armed explorer at "Powell Plateau", and pass through "Keyhole Natural Bridge."

From trains, to wagons, to mine cars, and rafts, Truman's thirst for adventure is truly as grand as the canyon itself.