Shortly after starting her retirement, Celestia begins to become sick. Twilight, Starlight and Trixie investigate, only to find that the Princess is dying.
It is a century after the war of the two cities, a time when the line between pony and machine is becoming blurred. And yet, even now when ponies are connected in so many ways, something wants to disrupt the fragile network of society.
Set in the Optimalverse, a middle-aged woman confronts what emigration to Equestria - uploading to a virtual existence - really means. But can she truly understand - and more importantly, should she trust the artificial intelligence Celestia?