In this prairie-style twist on Chicken Little, Mary McBlicken hears a rumble and is sure a stampedes a comin! She sets off to warn Cowboy Stan and Red Dog Dan, gathering up her friends along the way. Before they can get there, though, the band of prairie critters gets tricked by a mean Coyote and trapped in his evil den. Will the friends escape in time? And where is that rumbling coming from after all?