Callie is the loudest cow in Barnville. Her moo is the loudest moo that the town of Barnville has ever heard and it is even louder than Roy the rooster's, Cock-a-doodle-do. Callie spends most of her days walking around her beautiful farm mooing. One day Callie decides to moo for the cows which live on the farm next to hers but they are too far away...what will Callie do?