During their usual shenanigans the Cutie Mark Crusaders run into a mysterious new Unicorn in town, and after they interrupt her busy day they face a serious change in their life. By using an unknown spell the mysterious Unicorn flips the CMC's lives on their heads. With Applebloom now being a Unicorn, Sweetie Belle a Pegasus, and with Scootaloo an Earth pony, how will they get along?