Welcome to Gehenna, a brutal frontier planet at the outskirts of space. You've come to the humble town of Vestige in hopes of collecting a bounty on The Devil Riders, a violent gang of beast-riding mercenaries. Only the scrappiest folks have managed to survive out here - like Rose, a tough-as-nails warrior who's as keen with a katana as a pistol, and Juno, a rugged brawler most locals call The Hatchet.