Lately, there's been a problem that's been happening all across Equestria. Ponies have been found dead. Some cases, their bodies are covered with claw marks; a some cases, they only find red everywhere. It's an odd phenomenon that has been disturbing everypony, and some blame Luna from the fact that the ponies were killed in their sleep. Most suspect they were killed in their dreams, somehow killing them in reality. Out of these assumptions, Luna goes to investigate... She has no idea what Demon awaits her.