Best friends Rumpus, Tai, Phil, and Phlox are thrilled for the chance to make their first real mural, but when they fall into the world of their own epic painting, they suddenly have to face down the piranha-pistol-packing Wildhares, cattlefish stampedes, and buzzing battlebees of their own creation. Even if they survive, how will they ever find their way back home? Giddyup with the Scribble Squad as they ride into a very weird, very wild Old West!