After a colossal inheritance is divided, two heirs pursue contrasting projects: one funds a progressive industrial model and philanthropic enterprises; the other builds Stahlstadt, a heavily fortified industrial city devoted to weapons and domination. The narrative follows investigative episodes, stock-market maneuvers, clandestine plots, and armed confrontations as allies and specialists attempt to prevent the militarized city's expansion. Episodes shift between scientific description, political debate, and action, examining how technological progress, private capital, and national ambition can be perverted into threats, and concluding with confrontations that test moral responsibility and collective defense.