In a fantasy world of monsters, demons, and magic, humanity’s cities and towns rely solely on adventurers who could use the same magic and skills as the monsters to hold back what normal humans can’t. The City of Grain lacked adventurers to defend it and was at the brink of collapse before a mysterious figure came to them, bringing knowledge of modern technology and practices, such as electricity, trains, and the internet. The government adventurer, En, fights to look for a cure for his older sister who fell into a coma from an unknown illness, and learn more about the mysterious events surrounding The City of Grain.