In a world long past, the land now known as Equestria, the children of the day and night became locked in eternal war. The children of the night are the ancestors of the now scarce bat and spider ponies. The children of the day are the ancestors of the three tribes who came together to form current Equestria. The children of the night are born with an unnatural strength that has allowed them to push the forces of the day back time and again. The hope of those living in the daylight now rests with a single bat pegasus cross breed named Clair.