Luke lives by the ocean but dreams of tall mountains to climb, wide open fields to run through, dusty boots to stomp, and a pony for a best friend. In his dreams he's Tex, a rugged little cowboy with a great big job. Tex works on the Wymont Ranch, where each day is full of important responsibilities. He looks after the animals, checks fences, irrigates the land, rounds up the herd, and takes good care of his horse, Thunder.