"All that ever finds its way into the paper nowadays is morbid details of the latest brutal slaughter from whoever this sick pony is."

That's right, Equestria has its very first murderer! Villains have come and gone but never before have they claimed another's life. The stakes are that much higher as every day another friend falls victim. Twilight Sparkle and Princess Celestia must put their heads together and try to catch the elusive monster while there are still some ponies left to save. Can they somehow save the day or is this only just the beginning in a long and dark nightmare?