Cheerilee was thrilled when she became an alicorn and the Princess of Dawn and Dusk. Her newfound magical prowess has revolutionized her classes, and her students have never been happier. When she decides to help Apple Bloom through a difficult problem, though, she is challenged to the limits of her powers. Fortunately, she has friends who can remind her that, even when spells and strength fail, the magic of friendship can overcome all difficulties.