Equestria fell once into the claws of war. Ponies divided the kingdom, taking a lot of lives off the earth, a lot of dreams, a lot of love. When it all finished, they worked again to rebuild their lands. But now, while everypony's grieving and crying, an ancient evil, almost forgotten by Celestia, returns to haunt her and her subjects. They must join forces to defeat this enemy once for all. But before that happens, the Six Element Bearers need to find each other again.

The war took a lot from the ponies. Even their friendship.

Rainbow Dash has deep suspicions about Pinkie Pie. She does believe the party pony has a dark past which she tries to hide behind a curtain of laughter. And Rainbow Dash is out to find out that past.

Though they think Rainbow is kind of getting carried by the idea, Applejack, Fluttershy, Rarity and Twilight Sparkle soon get curious by it. Perhaps Rainbow Dash is right... Perhaps Pinkie Pie has some really dark stuff deep in her past...

...or maybe not.