Holly Bea's beloved bullmastiff, Buddy, is having a bad day. Left alone to guard the house, he is taunted by the neighborhood cats, who know that he can't touch them. Buddy is worried--will Holly be back soon, or is she gone for the day, or even forever? Much to Buddy's relief, Holly returns. They go to the park, but Buddy's fun is cut short by a pack of hostile squirrels and a team of Dalmatian firedogs who challenge his self-esteem. Will this day...