As a family gathers around the tree on Christmas Eve, their son Timmy has made a special wish in his letter to Santa Claus. But the letter is found – unmailed – by the lovable family dog Goober and his friend, Gumdrop the mouse. Together, they set off into the snowy night to deliver the letter to Santa. Overcoming many perils – including a lurking gang of alley cats – they finally find Santa. Timmy's letter is delivered, Gumdrop and Goober make it home safely and a boy's special wish magically comes true on Christmas.