Acorn is completely out of control when he is brought to the city kennel. Cute as he is, no-one wants to adopt him because he just won't listen. But then an experienced volunteer named Mary decides to take him home - just for a night - to give the kennel staff a break. That's when she discovers that Acorn doesn't listen because Acorn can't hear. Acorn is profoundly deaf. Determined to prepare the little dog for adoption, Mary develops a sign language just for him and, in short order, teaches him everything a well-trained dog needs to know. Along the way, she falls in love and the two become a team, reaching out to help other deaf dogs shine.