A ray of light appears simultaneously around the world every ninety-six years or so.
Some people who came into contact died, and those who survived had strange powers. This power transcends the limits of the human body and the magical power of this world, but everyone who obtains this power will eventually lead to self-destruction and become strange stories and legends.
There used to be patriarchs who ruled dozens of countries in the church, and their rickety bodies were hidden under the golden robes all year round; there were immortal phoenixes, and every life was a new journey; there were blood-sucking villains who raised humans and nourished them with blood for hundreds of years; there were beautiful elves who knew the mysteries and passed down memories; there were also humanoid dragons that preyed on them and had unparalleled power, and so on.
The first journey of the young Ciel is to accompany Fiona, the phoenix, wandering in the city and the wilderness, until the fateful crossroads appear.