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.
When Cork and Fuzz agree to babysit a young porcupine, Cork ends up doing most of the work, and when Fuzz gets into some trouble, it is up to both Cork and the baby to come to his assistance.
Although Cork the muskrat is short and likes to find things and Fuzz the possum is tall and likes to keep things, the pair remain best friends even after Fuzz finds Cork's lost stone and decides to keep it.