Imelda Noble is a merc and her latest job is by far the weirdest and darkest she's ever been given: to greatly reduce the population of an entire planet. Insane, right? It would be impossible for a pony to do alone. However, this planet is inhabited by a new alien race called Humans who are way smaller than any sentient species she knows and their tech is primitive at best. She towers over these little creatures and even their most powerful weapons are useless against her.

It just might be possible to wage war against an entire planet by herself under these conditions. But will humanity find a way to fight back or will her conscience crush her first?