Granny Smith. Big Mac. Applejack. Apple Bloom. They were all fine the night before, and now they were dead, only discovered by the other members of the Mane Six the morning after. The five friends vow to find the murderers and avenge the Apple family, but as the case goes on with seemingly no answer, they begin to suspect each other, and distrust weaves its way between the five ponies. With fear that the murderer will strike again, they must find the culprit before it's too late for them, as well as their friendship.