Over the past few centuries, one of the only constants in Princess Twilight Sparkle's life is her friendship with Discord. There is absolutely no way their relationship will ever change.
Tomorrow, Cadance will turn six hundred and forty eight. Luna decides to visit her ahead of time, in her dreams. One thing is for certain: it will be an unforgettable night.
The night that Cadance discovered the ghost of King Sombra lurking in the Crystal Palace should have been the worst of her life. Her greatest enemy is now lingering in her own home... and she knows that she's going to get to the bottom of this.