When a young traveling chef named Kawase arrives in the frontier town of Kingness, she finds it to be a perfect real-life replica of a town she used to dream about as a child. Intrigued, she takes a job as a delivery person and occasional chef for a local restaurant. Through exploration and conversations with the locals, Kawase gradually learns the history of the town, the mysterious castle that floats above it, the dangerous cavern that lurks below, and the unspeakable demons who have terrorized its residents.