Lisa's horrid, bratty cousin is staying with the Atwoods. The nine-year-old nightmare child acts charming around adults, but to other kids, she's a menace. Now she's trying to get the Saddle Club into trouble and it's working. No one believes that little Amelia broke an expensive hobbyhorse the Atwoods own. Or that she spooked old Patch into causing a stampede that almost got Pine Hollow's owner crushed. Instead, fingers are being pointed at the Saddle Club. Can Lisa, Stevie, and Carole clear their good names?