In 1920s America, an impulsive young nun and her partner work as professional exorcists while she searches for her kidnapped brother.
Rosette belongs to the Magdalene Order, but the demands of demon hunting leave little room for a quiet religious life. Chrono accompanies her through missions that put a personal search beside institutional duty. The setting combines period clothing and urban life with supernatural danger, giving their partnership both everyday work and an urgent private purpose.
The workshop figure’s goggles and equipment add a practical side to the exorcists’ world. Rosette’s cheerful expression introduces a different register from the dangers of her occupation. That range matters to a story in which the same pair must handle assignments and carry a family concern forward. The television run gives this partnership a defined commitment without merging it with the manga.