Abbygail and her friends have a slumber party at the barn with Mr. Big Bob, the miniature horse. They are introduced to his new roommate, a little white barn mouse. His name is Swiss. He has a cute story to tell with clues about the whereabouts of one of their missing friends. That night Abbygail has a colorful dream about being in a parade! The friends get to know each other a little better, and a brand new friend is introduced, as two friends will be leaving. Which friends will it be?