It's September 12, and it's a special day. It's Macintosh's birthday. This should be the happiest day of the year for this miniature schnauzer. But why is he so sad? As Macintosh wakes up and journeys through his day, he thinks his owner, Mia, has forgotten his birthday. On his walk, none of his dog friends wishes him a happy birthday. Did Macintosh's pals really forget his special day? The Adventures of Macintosh, the Miniature Schnauzer, tells the heartwarming story of this little dog and his big surprise.