Marmaduke is watching a Western with the Winslows and is really getting into it when Phil turns off the t.v. and they go to the store. Marmaduke takes a nap and starts to dream about the West just like in the television show. He dreams that he takes on the job of being the sheriff and he has to deal with the villain Too Tall Tony. They meet and have a duel to see who is the quickest draw and Marmaduke draws his picture first. Tony gets tossed out and he vows to work on his drawing. He tries to practice being bad by rustling cattle and he rustles Marmaduke instead who jerks the rope and sends Tony into a cactus then chases him out of the state. Tony returns to challenge him to a draw again and loses. Tony then tries to roll a boulder over Marmaduke but it misses and comes back and flattens both of them and just then Marmaduke wakes up when the Winslows come home and Too Tall Tony runs out from underneath him and out the front door.