A burned-out soldier gets handed a domain with literally nothing in it. Alna arrives to teach him that building something from zero is a different kind of warfare entirely. Every problem that kills him isn't a monster or a rival general, it's crop rotation, seasonal planning, the weight of actually caring about people who depend on you. The show watches him unlearn decades of violence through the smallest possible stakes. His hands don't know how to plant seeds. That's the entire story. By the time you realize you're watching a man heal through agriculture and genuine companionship, you're already invested in whether his barley survives the winter.

After decades of war, Dias finally comes home, hailed as a hero and handed a domain of his own. The prize turns out to be an empty frontier of endless grassland with no villages, no people and a population of zero. Having known nothing but battle, Dias is at a loss over how to survive there, let alone turn the land into a thriving territory. He resolves to build a domain from scratch, and his lonely frontier starts to come alive when he meets Alna, a mysterious girl with a blue horn who shows him the plains hold more than they seem. The series is a fantasy slice of life mixing action, comedy, drama and romance.