Greengum is a rural town far from the Kingdom of Greatland. Although it has fallen under the control of demons, the kingdom’s military is too short-handed to organize a relief force. And so, Erica Sherland—a rookie hero with a strong sense of justice—rises to the challenge. Despite being resented by the townspeople, who have all but given up hope, Erica ventures into the dungeon alone. But with powerful enemies awaiting her inside, overcoming it with her strength alone will be no easy feat.

Erica must find all sorts of ways to persuade the townspeople to lend her their aid...