On a rainy night, forensic doctor Su Wan saw burn marks on a corpse.
She is the last pure-blooded descendant of the nine-tailed fox. She performs autopsies with a scalpel during the day and pretends to be a human with her tail tucked away at night. She thought she was hiding well - until a fox sigil was found in the stomach of the corpse, and someone put a note in her pocket: "The key is awake."
Lu Yan, a cultural relic restorer, has a steady hand and a cold heart. He specializes in antiquities and kills monsters. He took the job of repairing an ancient bronze bell, but the tongue of the bell was made of living fox bones. It rang when touched, and it was her who rang.
He chased the copper bell and found her. She looked at his demon hunting token and smiled - a descendant of the family who had hunted demons for three thousand years, met a demon who refused to become a demon.
She is a demon and he kills demons.
She hides her tail and lives her life, while he hides his tail and hunts for his life.
She wiped the blood on the floor for him, and he repaired the broken bell for her.
She thought the worst was that her identity would be exposed, and he thought that the worst was just a matter of giving orders——
Until the world-destroying demon behind the scenes who had been sealed for three thousand years awakened, and the key to unlocking the seal was her.
