It's been fifty years since the banishment of Nightmare Moon and ponies are turning up dead. Lord Frosthoof, Captain of Celestia's Solar Guard, is found dead in his rooms, assassinated by means that nopony understands. Ghostwriter, a young Scribe of Canterlot, hopes to take on the story for personal gain. But when the murders start getting more and more personal, Ghost finds himself fighting to stay alive as much as anypony, leading him to horrifying conclusions about the murderer.