When Charlotte Gray, Luna Harrison, and Michael Taylor are chosen for a perilous quest, they find themselves thrust into the heart of an ancient and terrifying mystery. Tasked with retrieving a powerful artifact hidden deep within the Vault of Endless Night, the three demigods-each with their own strengths, fears, and secrets-must face a deadly adversary: the Shadow King, a being of unimaginable darkness with the power to consume the world.
As they battle relentless monsters, unravel cryptic prophecies, and struggle to keep their sanity in the face of evil, they discover something even more dangerous than the Vault itself: each other. With Luna falling prey to the shadow king's influence, Charlotte's wit and cunning, Michael's strategy, and Luna's healing powers are put to the ultimate test. Forced to work together, they learn that their bond is the only weapon powerful enough to defeat the shadows-but their journey is far from over.
In this high-stakes adventure, old friendships will be tested, new ones forged, and the line between light and dark will blur. The Vault may have been conquered, but the true battle is just beginning.
Celestia: "Twilight, you're going to be the Princess of Equestria!"
Twilight: "I know! With my friends, I can-"
Luna: "What? No! Don't be ridiculous. With Midnight."
Twilight: "...Who's Midnight?!"
Turns out, Twilight's not the only alicorn in line for the throne-Luna's been training a secret protégé of her own! Midnight Radiance, mysterious, powerful, and raised in the shadows, is just as ready to rule as Twilight is. Now, it's a battle of destiny, magic, and maybe just a little bit of pettiness.
Who will wear the crown? And more importantly...why didn't anypony tell Twilight about this sooner?!