It has a golden horn. It has a purple mane and white wings. Could it be? Stink's friend Sophie takes the lead in this final, buoyant Judy Moody and Friends adventure. "Don't let the unicorn get on the bus!" yelled Sophie. Unless Sophie's eyes are playing tricks on her, a real live unicorn is on the loose! In her town! Sophie knows that if you touch a unicorn, you'll be happy forever. She also knows that unicorns have healing powers and can poop rainbows. Sophie needs that unicorn! But unicorns are almost impossible to catch. Can her friend Stink, her faith in magic, and a bunch of carrots help make Sophie's wildest birthday wish come true?