Andrea's best friend moves to California. She decides to try and earn enough money for an airplane ticket to visit her friend. But babysitting doesn't pay much, and dogsitting becomes a liability when her charges wreak havoc at the Fernfield summer festival. The boy next door, whose love for volleyball, could be Andrea's ticket to San Diego. In the meantime, Buddy is dognapped and then coerced into nabbing a prized diamond for some bad guys.
Buddy shows he's a natural baseball player with major league talent. In the midst of the season, however, a terrible discovery is made: Buddy's now-grown pups have mysteriously begun to disappear from their new homes! Now it's up to Buddy to stop the dog-nappings and find his pups before it's too late.