One day, while the Cutie Mark Crusaders are trying to think of how to gain their cutie marks, Sweetie Belle gains the power to use magic from thinking so hard. The girls then think they can get their cutie marks for magic, so they all work to teach Sweetie Belle so she'll become better at magic. Unfortunately, all the other ponies don't think they are capable of using magic very well, after seeing them fail at so many attempts to get their cutie marks. The girls then decide that Sweetie has to do a very powerful spell that will impress everypony, but the spell they choose might be too big for them to handle...