When Polly wakes up one morning, she finds her world covered in fog. She can't see the apple tree or the duck pond or the horse barn. Mama says they're all still there, but how does she know? Together, Polly and Mama set off to find the familiar landmarks of the farm, and along the way Polly discovers there are some things she just knows, too. Soft, evocative watercolor paintings bring to life this gentle story about a day of simple discoveries and a child's growing confidence in her perception of the world.