Meet Maud.

Maud isn't your typical Canterlot High student. She often eats lunch by herself, never has sleepovers with anyone and seems to spend most of her time with her pet rock she named Boulder.

Her sister, Pinkie Pie, reckons that needs to change. And she'll try her hardest to get Maud some friends that are elementary, not sedimentary. After all, how can Maud ever know the joys and benefits of having friends if she doesn't have any?