This is a demon slayer story that incorporates bloodline and other elements. The stronger the bloodline, the stronger the power.
In this worldview, Wuhan, who cannot look directly into the sun, is just an experimental ghost king. Behind the ghost king, there is a powerful ghost organization. They are hierarchical, playing with the power of the world in the dark world, and controlling the development of everything, but their ultimate goal is to get a share of Avalon's power. As long as you have that power, you can break through the limits of the ghost body's combat power and become completely invincible in this world. At that time, you may be able to call that state a god. However, the final tragic ending will only belong to those ghosts who slaughter everything.
Because there are countless demon-slayer swordsmen who come one after another, just to eliminate the demons who are addicted to life.
