When Fluttershy tags along on Pinkie's quest to spread Hearth's Warming cheer, she can't help but wonder how the party pony so easily pulls off the impossible.
Pinkie Pie reveals a recently discovered side of herself to all of her friends - except for Fluttershy. Fearing the worst, what will happen when Pinkie can no longer hide?
When Pinkie Pie receives a miniature doll version of Fluttershy, she spends every waking moment loving the toy, leaving the real Fluttershy jealous and heartbroken.
A mixup at the mirror pool separates Pinkie Pie from her alter ego, who then has to learn how to live in a world where she can't count on Pinkie's cheeriness to take over again.
Pinkie Pie wakes up in a forest. She recalls going on a camping trip and traveling with Fluttershy. But she remembers nothing else. Pinkie Pie is determined to find Fluttershy and find out where they are. And once that is solved, to find home.
It's Fluttershy's birthday; she wants to, and is, spending it alone for once - other than Angel Bunny, of course - but if one pony was to intrude upon her solitude, would it really be so bad?