This action-packed story is told in Luna's perspective. It is now Luna's turn to teach a student of her own. That student however happens to be Trixie Lulamoon. Of course Twilight Sparkle objects to this but will she be able to convince Luna of Trixie's dark side? What if all of this is part of Trixie's plan to become 'The great and all powerful' mare that she so desires to be?