Sunset Shimmer has betrayed Celestia and entered the mirror to another world. However, the first day in this new world would change everything when an accident causes Sunset Shimmer to lose her memories.
An accident results in a falling out between you and Rainbow Dash, the mare of your dreams, and your friendship with her lies on the brink of destruction.
After a peaceful night of meteor showers, Derpy Hooves finds a strange, amnesia-ridden stallion at the edge of town. Helping him regain his identity is a quest in itself, but Derpy has no idea of the vast scale of adventures it will lead to.