In the World of Arah where Beings such as witches and magicians exist, Kim Yongsun is but an Infirmary Angel working in Heaven. But when her path crosses with a witch, with whom she strikes a Witch’s Bargain, Yongsun’s life is flipped upside down. And when three Jaegers come after Yongsun’s head, Yongsun flees across the Land of Couronne. On her journey she must face her past, confront the Stars, rise to meet her true Destiny, and last but not least, attempt to defeat an ancient evil,

Yongsun a florist leading a monotone life finds a ray of sunshine in the person of Hyejin, a student who enters her shop on an April evening. The student which always appears bearing new injuries on her body finds new comfort in the unexpected kindness. Slowly, a new opportunity for happiness rose from the flowers watching over them.

Yongsun is a civil engineer living in a world where flesh is slowly being replaced by steel: it is inhumane and immoral, so she protects herself and her mind by living in accordance with her theory — the Theory of Life — as she tries to remain sane in a world of mechanics and madness.   Put simply, here is Yongsun’s theory: The beginning is the end, the end is the beginning.