This tale intertwines the lives of individuals within a bustling coal mining town known as the "Hakoniwa," filled with small-scale excavators. Amidst the labyrinthine changes of daily life, Kagari operates a mapmaking business while Yuya harbors aspirations of escaping the confines of the "Hakoniwa."
As fate would have it, the duo, accompanied by the town's eclectic inhabitants, becomes embroiled in a far-reaching conspiracy that threatens the very fabric of their community. The destiny of the "Hakoniwa" hinges upon Kagari's skillful illustrations on her maps.