Today is a special day and Pinkie Pie's mental state is in a bit of a Topsy-turvy state (I mean more so than usual). Surprise has been giddier and happier, and Pinkamena has been more angry and anti-social. They both know what's today. One of the best days for Surprise is the worst day for Pinkamena Diane Pie. As they debate how to celebrate "That Day", what will happen to Pinkie Pie?