It's Twilight Sparkle's first night as a princess, and she can't sleep. Her thoughts are haunted by a question that will not let her rest. A question that only Celestia can answer.
Nine years after Discord brought Equestria to ruin, Spike must return with Rarity, the CMC, Trixie, and Ditzie in a vendetta to destroy Discord and restore their lost home. But Spike will soon come to realize this goal may bring more pain than peace.