An E.Q.U.E.S.T.R.I.A Spies story

Because of their bond growing stronger, the Mane 7 form a band called the Rainbooms to help improve their friendship and compete in the upcoming CHS Musical Showcase. They even go out of their way to invite their new friend, former bully and student of Princess Celestia from Equestria, Sunset Shimmer. And even though her efforts to gain everyone's trust is still sour, Lightning and Karly give her support. However, when a trio of new students called the Dazzlings arrive, their strange antics and reveal of magic causes the showcase to become a Battle of the Bands with everybody literally at each other’s throats. Only the Rainbooms are unaffected by these circumstances, so they call for their friend from Equestria, and Twilight Sparkle makes a return to Canterlot High School in order to compete in the Battle of the Bands alongside Lightning, Karly, Sunset and the others, to save their school.