It has been over a half-century since Spike last saw Rarity alive. He never got to tell her those three simple words that he needed her to hear, even on the eve of her death, and it has haunted him ever since. How would Rarity have responded if Spike had managed to say "I love you?"

Enter the Spirit Candle, an enchanted candle as old as the Canterlot palace. It is able to project the shadows of spirits, and is particularly powerful on Nightmare Night during a full moon. Spike doesn't even know if it will work, but with Twilight's help, he's going to try. He may finally get his closure with Rarity. But what will the cost be?