Chrono Crusade, originally known in Japan as Chrno Crusade, due to a typo, is a Japanese manga series written and illustrated by Daisuke Moriyama. It was originally published by Kadokawa Shoten in Comic Dragon, then a special issue of the Dragon Magazine. A 24-episode anime television series by Gonzo based on the manga ran from 2003 to 2004 on Fuji TV. The series was released in North America by ADV Manga and ADV Films, titled Chrono Crusade.
Set in New York during the 1920s, Chrono Crusade follows the story of Rosette Christopher, and her demon partner Chrono. As members of the Magdalene Order, they travel around the country eliminating demonic threats to society, while Rosette searches for her lost brother, Joshua.
Chrono Crusade is set in the height of the Roaring Twenties, where jazz is king, bootleg liquor flows freely, and the mob rules the streets. It is a time of prosperity, luxury and decadence, and the division between rich and poor grows even wider in the wake of the First World War. It is at such times of great change and upheaval that the dark things that lurk below the world of man can come to the surface. In the world of Chrono Crusade, a fictional organization known as the Order of Magdalene (home to the characters Sister Rosette Christopher and her soul-bound demon partner, Chrono) exists to fight the demonic threats that appear with increasing regularity across America. Both Rosette and Chrono are revealed during the course of the story to be driven by a shadowy past, centered on a search for Rosette's lost brother Joshua who is shown to have been taken from her by the Sinner, Aion, a demon who shares a dark and bloody history with Chrono. He seeks nothing less than to overthrow the delicate balance between Heaven, Earth, and Hell (in the manga it is the demons' hierarchy he wished to destroy).
The anime follows the manga through the events of Volume IV, but it diverges during a crucial plot event, creating different courses of events and endings.