The story of Freddy's First Christmas centers on a friendly field mouse named Freddy. Freddy has many bird friends and is envious of their ability to fly. When the weather turns cold, Freddy seeks shelter in a nearby house where he meets a Christmas tree angel named Angie. Angie suffers from old tattered wings but is otherwise a fine angel. On Christmas Eve, Freddy finds a misplaced letter to Santa from Billy, the boy who lives in that house. Freddy devises a plan to use his bird friend feather collection to repair Angie's wings so they can fly to the North Pole and deliver the lost letter to Santa in time to save Christmas for Billy. But once airborne, they become lost but are saved by a shooting star named Scooter who whisks them to the North Pole where Santa saves the day. In the process of helping Billy and Angie, Freddy learns that by helping others, he too was rewarded by friendship and realizing his dream of flying.