On a normal weekend, Cheerilee assigns everypony an assignment from a unit she has been using for years. She considers it to be the most important one of the year; to teach the fillies and colts about the differences between ponies, and how they can all work together to do more than they could on their own. Unfortunately, a confused trip to the library by three fillies raises questions the teacher can't answer.

In an effort to make sure she teaches everything she can to the best of her ability, Cheerilee enlists the aid of Twilight Sparkle to help rewrite the textbook she has been using for years. As the days tick by, however, she is forced to deal with something she thought she had a handle on a long time ago.

Pinkie Pie is offered a special position in a secret law-enforcement program. At least, that is what the mysterious pony said. He says strange things, and always seems to be hiding something about what Pinkie is supposed to be doing. Teen for overt violence.

When Lyra Proposes to Bon-Bon, Pinkie's zealous promotion of the noble wedding of the century attracts some unexpected and unwanted attention. Can Pinkie and her party ponies pull off the biggest wedding Ponyville's ever seen to give the two most deserving ponies a happily ever after?

Octavia is a high-class pony. Fine alcohol is her wont, and uncouthness her intense chagrin. Such is her surprise to find herself lumbered with an insufferable oaf of a DJ pony. However, sometimes these situations work themselves into a satisfactory ultimatum all the same.