(Takes place prior to "The Big Mac Question for obvious reasons.) Cheerilee arranges a meeting with Sugar Belle at the schoolhouse to discuss the subject of Big Macintosh. Specifically, Cheerilee wants to clear up a misconception Sugar Belle has.
After Cheerilee gets tackled by Starlight Glimmer into her closet, which won't open, they end up being stuck for 2 hours. Who knows what will happen in that time.