After the war between immortals and demons a thousand years ago, the two sides signed a peace agreement and became mutual friends and non-aggression. If it violates the border again, it will be regarded as breaking the covenant, and the whole universe will be able to attack it.
After that, the immortals and demons were clearly separated and no longer interacted with each other.
She is a female devil who was sent to the human world to find Wang Jiqin, but unexpectedly she was involved in the confusing dispute between immortals and demons...
Concept: Adult fairy tale