The promise begins. After times of prosperity, people must endure the twilight. As another twilight period begins in a region of the world where people live modestly once again, this land lacks a system of a governed nation; nevertheless, the people live together, hand in hand. There, in a remote workshop, lives a girl who earns her living by making medicine. This girl is named Ayesha. She used to live with her grandfather and younger sister, but after her grandfather passed away a few years ago, her sister also disappeared. Now, all she has left is her pet cow and her loneliness.