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...