Shen Shuyu couldn't remember how many years he had lived.
A disaster unexpectedly gave her the power of immortality, and she changed her appearance and wandered around the world for thousands of years.
By chance, she established the "Yin and Yang Division" and became a part-time worker traveling between the yin and yang realms:
Send ghosts with deep obsessions to reincarnation, solve weird things that science cannot explain, and keep the fireworks and the order of yin and yang in the world.
She has seen the wars of thousands of years ago, and she has also seen the neon lights of today;
I have sent away countless passers-by, but I will always stay in time and be the longest bystander in this world.
Intention: The choice between life and death, fate and protection