Luna is angry at the lack of appreciation for her nights. As her building anger reaches a climax, Celestia is confronted with an enraged Luna, who ultimately loses herself to the corruption of her anger. Becoming Nightmare Moon.
Celestia must try to reason with her, or ultimately stop her in order to protect her town. After these events, she is faced with more problems and has to protect the town from the beasts of the forest.
This is my first attempt at writing anything, so sorry if it is kinda poorly written and stuff. I don't intend to do anything more with this, so I am just gonna leave it as is.