Abaguchie mania! Caroline Malloy shivers happily when her on-again, off-again enemy Wally Hatford tells her that a strange animal known as the abaguchie has been spotted in their neighborhood. According to Wally, an abaguchie skeleton was found years ago in the cellar of Oldaker's bookstore.Wally swears Caroline to secrecy and warns her not to go down and search for herself. But Caroline will do anything to solve the mystery of the bones. Wally, who's sure that boys are smarter than girls, tries to foil her plan. Caroline knows girls are smarter than boys and means to prove it with the help of her sisters.