When Celestia banished Nightmare Moon, she didn't go alone, but with her loyal army. Now they're trapped in an alien environment, with tensions high and the air running out. If they don't work together, their princess will soon be alone after all.
The Equestrian Civil War begun in Armor's Game continues as the Princesses prepare to move against the usurper Blueblood in Canterlot, while Princess Cadance leads an expedition north to find a nameless terror
Thirsty for vengeance against Queen Chrysalis, Shining Armor leads an army south to deal with the Changelings. Prince Blueblood schemes for absolute power in Canterlot. And in the black north of Equestria, an ancient terror threatens to destroy all.
Trying to spice up Celestia's love life, Luna signs her up on a dating website. Now Celestia has to go on a series of dates with other immortals. This should end nicely.