In a realm governed by three dominant powers—the authoritative Church, the influential Order of Clausius with vast resources and military strength, and the Guild of Commerce catering to merchants and craftsmen—a captured alchemist named Kuusla strikes a deal with the Order after his imprisonment for an attempted sacrilege. Alongside his comrade Welland, they are assigned to the frontline town of Grubetti, renowned for its sophisticated workshop. Here, Kuusla encounters a vigilant nun named Urle Fenesis, who identifies herself as a vigilant guardian.