Rainbow Dash doesn't know why she does it. But sometimes, late at night, she will wander the streets of Ponyville and kill a victim before hiding the corpse. She doesn't really want to kill victims though, but she still does... After some deliberation, she decides to enlist Rarity's help in finding out this mystery!

Cover image: https://knowyourmeme.com/photos/364439-my-little-pony-friendship-is-magic