Princess Luna takes on a Night Apprentice, her counterpart to Princess Celestia's Faithful Student, Twilight Sparkle.  Nova Shine, a wandering Unicorn Pony from Canterlot, occupies the position for the first time in a thousand years.  What neither of them know is that there exists a long-standing history between the positions of the Faithful Student, the Night Apprentice, and the mysterious shadow that seems to keep popping up in Nova's and Twilight's dreams.  This shadow, whatever it is, and the nightmares it appears in do not bode well, but the Princesses won't explain what they are to either Nova to Twilight Sparkle, despite their equal or perhaps even greater concern on the issue.

Nova and Twilight agree to look further into this issue, and this mission occupies them for some time.  But their relationship starts to develop into something more than just fellow students.  While Twilight seems to embrace these feelings, Nova attempts unsuccessfully to distance himself from them.  As if to make matters worse, ponies from Nova's past begin to complicate matters; a pony from their shared past, one Trixie Lulamoon, also shows up to antagonize the situation.

Finally, there's also the shadow itself.  An ancient and most dangerous enemy, it seems to have kept itself quiet for the last thousand or so years.  Why it chooses to reveal itself now is anyone's best guess, but unless Twilight and Nova can stop it, there's no telling what will happen to Equestria...

Ten years ago, Princess Twilight Sparkle mysteriously vanished without a trace.  She was most well-known for inventing a device called the computer, which revolutionized technology all across the land.  She had confided in her son Arcturus about a world within the computer, but he has since dismissed these stories as nothing more than fanciful bedtime tales.

But when a mysterious message appears on his mom's friend Trixie's phone, from a number that once belonged to his mom's old lab beneath her library, Arc sets out on a journey to find his mom that will take him to the very place he thought did not exist:  inside the computer itself.

NOTE:  Listed as romance.  It will be between two OCs.  If you came here for Twi-shipping, there is none that has any impact on the story.  Just throwing that out there.