Frank and Joe Hardy search for clues to solve the mystery of the Beast-o-matic, which crazy inventor Mike Mendez has apparently used to turn their friend Chuck into a dog.
When a book of baseball statistics disappears from the school library, Frank and Joe Hardy try to find the thief, but when the book turns up in Frank's backpack, Joe has to find who did before Frank is punished for a crime he didn't commit.
Frank and Joe thought they would have fun at their friend's birthday party, but when a video is stolen, the brothers have to solve the crime before the party is ruined.
