While Twilight's foalsitting Flurry Heart, the Cutie Map summons her to a new mission whose location quickly worries her. She'll need a lot of courage when she finally realizes her new mission is to reform one of her oldest and most evil enemies.
Nightmare Moon had expected a fight upon her return, ponies cowering in fear as she's forced to battle her sister once more. However, there were things that she had not even considered a possibility. A sincere, warm welcome was one of them.
Starlight had done it: She successfully prevented the rainboom and destroyed the time spell. Now, there's only one way Twilight and Spike can save the future: Help their friends earn their cutie marks.
For three thousand years he waited, mourning the loss of his mate. But now he found her but she doesn't remember what they had. Luckily Sombra has a spell to fix it.