Billy has a very normal life, growing up in a typical family in a nondescript town. His dog, however, is a bit unusual: a cocker spaniel with human-or, as he often reflects himself, superior-intelligence. Buddy's got his posse of dog pals, his nemesis the neighbour's cat, and his almost-sister Caroline, the family tortoise. But it is with his best friend Billy that he gets up to the highest mischief, targeting everyone equally with love and abandon.