When Diamond Tiara is forced to take her place as head of the family business, she learns that it isn't all just store openings and board meetings.

As war threatens Equestria, their most legendary threat may prove to be their salvation.

For Luna, her peaceful life was shattered in a single night of destruction and bloodshed. Now left as Equestria’s sole ruler, she must protect the kingdom from the many horrors that lurk in the darkness.

After a tragedy resulting in the loss of her sister, Luna takes over as ruler of Equestria. A dangerous enemy threatens to plunge the kingdom into war...but she won’t be fighting them alone.