When Possum is awakened on the first day of spring by a loud noise that won't stop, he and all the other animals, who have also had their winters' sleep disturbed, set out to discover who is making all the racket.
Fuzz, a possum who likes big excitement, convinces his friend Cork, a muskrat who prefers safer adventures, to go on a snowy exploration, which leads the friends into a situation the reveals the truth about their bravery.
Cork, a short muskrat, and Fuzz, a tall possum, both like to collect shiny stones, but Cork must act fast to save his friend when Fuzz angers a mother duck by trying to take a "stone" from her nest.