Three years before the predicted return of Nightmare Moon. A young Princess Mi Amore Cadenza hears about the tale of the Changelings. She feels a kinship to this race that subsists on love, and convinces Celestia to allow her to go alone in a mission to try to learn about them and normalize their relationship with Equestria.
Soon, she meets Queen Chrysalis, and the bonds between those two will determine whether the mission is sucessful or not.