When you're used to having it all, what do you do when it's all taken away?

Equestria is dying. The days grow colder, and the nights grow darker. The stars are fading from the sky, and the plants are dying. It's up to Twilight Sparkle to find out how to stop the apocalypse before it's too late. But when ponies start disappearing and memories fade, what could it possibly mean? Strange noises and voices echo in her head and she starts hallucinating. Could it really be the end of the world, or is it something darker? Only time can tell, and her days are numbered.