Ever since the events of the Fall Formal, Sunset Shimmer has done a lot for Canterlot High, saving the school and its students many times now but even then, Sunset doesn't feel like it's enough. She then decides to take on the seemingly impossible: reform their old adversaries, The Dazzlings, starting with the leader, Adagio herself.

Sunset and Adagio decide on a bet: if Sunset can win her over on "the magic of friendship" in a week's time, Adagio will give it a chance and maybe convince her fellow sirens to follow suit. Will Sunset succeed and make a new friend (or possibly three) or will she truly be in over her head?