Pete's not afraid of anything. If there's a mystery to be solved, he's your cat. Pete is Alex's cat. And since Alex and his family moved into the new housing development, Pete is Alex's only friend, too. Things start looking up for Alex and Pete when Rocky, a boy Alex's age, moves in next door. But Rocky isn't very friendly, and Alex starts to suspect he's hiding something. And when the neighborhood is terrorized by a rash of fires and vandalism, Pete knows that he's got to investigate.