Frontier

Earth, the distant future: climate change has reduced our verdant home into a hard-scrabble wasteland. Saints and sinners, lawmakers and sheriffs, travellers and gunslingers and horse thieves abound. People are as diverse and divided as they've ever been - except in their shared suspicions when a stranger comes to town.
One night a ship falls from the sky, bringing the planet's first visitor in three hundred years. She's armed, she's scared... and she's looking for someone.