Midsummer Mayhem!It"s the eve of the Lakeville horse show and Tess"s horse, Witches" Brew, is scheduled to compete. But suddenly the mare starts acting crazy! She goes wild -- kicking and foaming at the mouth. No one can control her. Lucinda wonders if magic might be involved. Could the mare be under a spell? And who is the mysterious red-cloaked figure Sally sees vanish into thin air? The girls suspect that Lucinda"s archenemy, an evil witch named Augusta, may be in town. If it is Augusta, she can be a real threat. Augusta has always been super jealous of Lucinda -- and there"s no telling what she might do.When Witches" Brew disappears without a trace, the girls must use all their sleuthing skills and magic powers to unravel the mystery. But will they be able to find the mare in time for the show?