This is Equestria. But something went differently this time. The Everfree is even more out of control, and has become a breeding ground and nesting place for thousands of dangerous creatures. With so many new threats constantly changing, evolving in the darkness, no one knows what the next monster could be capable of. In such a world, the Unknown means Danger.

Meet Pinkie Pie. She's an earth pony who likes parties and making everyone smile. She's very, very good at it.

That's a bad thing.

You see, some of the things she does are... strange. Unnatural. Sure, parties may be her special talent, but that doesn't explain where she got a cannon that can decorate a room. And it doesn't stop at parties. There's something unnatural about that mare. No one can explain it.

Pinkie Pie is an Unknown.

Unknowns are dangerous.

Princess Celestia has taken the poor pony under her wing, and raised her away from unfriendly eyes, allowing her to live what approaches a normal life. Soon, Pinkie will be reintroduced to the world at large, starting with a little town called Ponyville, on the day of the one-thousandth Summer Sun Celebration.

Let's see how that goes.