A baby in a stroller sleeps listening to loud city noises, from ten horns beeping to two motorbikes roaring, until awakened by the soft chirp of one sparrow.
Ruthie is sent to spend the day with her Aunt Juanita who is about to have a baby, and does a great job running errands for her aunt until she is distracted by a litter of new kittens at the store.
While his mother is looking for food and his father is tending their egg, a young penguin named Milo is charged with delivering the mail, not knowing that he is about to make a very special delivery.