Blood Moon is a girl created by her psycopathic uncle with the intention to kill both queens of Canterlot for executing her. Thinking that he would achieve his goal, Blood Moon turns her back on him and murders him.

She goes towards Canterlot Castle and assaults it all by herself. Killing every single guard with her dark magic and gravely injuring both Queen Celestia and Queen Luna. Before dealing the final strike, Druid Fluttershy saves both just in time while Paladin Pinkie aids her escape by battling Blood Moon. The battle was short lived before the castle all of a sudden gets surrounded by huge thick scarlet clouds.

A mysterious girl after knowing what happened, travels through a portal in an abandoned temple which will lead her to an alternate Canterlot, hoping to get help and defeat the now self-proclaimed Queen Blood Moon.