Frankie and Devin have been transported once again, this time to Mark Twain's The Adventures of Tom Sawyer. The two class troublemakers take delight in meeting their match -- Tom is the original school slacker! They follow Tom, Huck, and Joe Harper around, in hopes of finding a lost page of their librarian's book. But they soon discover that all is not so calm on the lazy Mississippi when they witness a murder and join the unruly boys to foil a criminal's scheme.