Sunset Shimmer, now formally in charge of keeping the magic at Canterlot High in check, and her friends, two months after the Friendship Games, find themselves in a new frenzy to find the source of increasingly troublesome displays of magic in and around their school, while also dealing with the return of their old enemies; The Dazzlings. The three claim, despite their rude and abrasive behavior that their on the path of reformation, but it hasn't been lost on a single one of the Main that the magical incidents began just after they began attending CHS once again. Sunset, in particular, becomes more suspicious of the Dazzlings as they take an interest in the amnesiac new girl she's been charged with helping settle into the environment of public education. The pot stirs further when evidence that that aforementioned student has more to do with the rouge magic traversing around Canterlot City than anyone initially imagined. As the equation begins piecing itself together on the board, unfolding the nature of the new girl's abilities and the hand the Dazzlings are playing in manipulating that growing power, Sunset and the others can only hope to pry her from the former Sirens' claws in time to help the lost and frightened unicorn save herself from the magic that is consuming her and teach her where true friendship lies and exactly how to find it.