In sixth grade now, the wildly imaginative Rex Zero and his friends hatch a plan to replace Miss Garr, the substitute teacher from hell, and Rex takes on the persona of none other than "Dr. Love." Of course, events spin hilariously out of control. Miss Garr's cruel behavior is a mystery to Rex. But then, Rex's world is full of mysteries There's the beautiful woman in white. Why does she have a black eye? There's the little black book filled with names...