New World

At the age of 7, Katrina Anderson's entire world ended as alien invaders landed on the Earth and ravaged it for resources to grow their empire. Seven years later, with the Earth stripped of anything valuable to them, the aliens left, leaving in their wake a destroyed world, with no way to rebuild.
In the years after, people did everything they could to ensure their survival, creating a new world full of savages.
Will Kat be able to survive this new world, and perhaps change it for the better? Or will she be just another victim of humanities cruelness?