Thirteen-year old Kate and her friends came up with the perfect way to raise money for her autistic younger brother and others to attend summer camp--a horse scavenger hunt! As local businesses donate money and prizes, Kate keeps the entry fees in her mom's antique jewelry box. But when the box and the money disappear, Kate and her friends must unravel the clues, hold on to hope, and solve the mystery along the Blue Ribbon Trail Ride.