What's Worse Than the End of the World? One Man is About to Find Out.

Frank just wants to hunt monsters in peace. He's good at it and prefers to kill evil creatures alone. But when the power suddenly goes out, blazing rocks fall from the sky, and a stranded girl is thrust into his life, everything changes.
Now Frank finds himself tasked with defending a girl whose feistiness may prove more than a match for his hard edges. Even worse, his new companion is being hunted by a new threat - a monster Frank has never encountered... and may be unable to kill.
Can Frank survive a world-ending cataclysm, defeat unkillable monsters, and keep his companion safe from the creatures and herself, or will it all end in fire?