It's the one year anniversary of two mares: Lyra Heartstrings and Bon Bon. Unfortunately, Lyra has forgotten all about it and is met with a disappointed Bon Bon.
In order to save face, Lyra lies and says she was playing with her to see if she remembered. When Bon Bon suspects she truly forgot, she makes a bet with her to see if she really did put together a nice night for them.
Now Lyra has to put together a completely on the fly anniversary... and things don't necessarily go as planned...