On Bonnie Bumble’s farm, winter arrives with huge, wool-sized snowflakes that send shivers through every creature—from cows to ducks, hens to dogs. Teeth chattering, Bonnie knows something must be done. With needles clicking and yarn flying, she sets out to craft warm sweaters for all her chilly friends. But warming hearts isn’t quite the same as warming skies—how will Bonnie bring back the sunshine?