On a rainy night beneath a full moon, Su Qingyuan, an ancient-book restorer cursed by a sinister spell after working on a book steeped in malevolent energy, stumbles into Yanzhai, a quiet shop on the antiques street.
The shop's owner, Shen Yan, has a cold, piercing gaze. He traces a talisman in cinnabar with his fingertip and sees through her secret at a glance. "This isn't an illness. It's a life-debt from the day you were saved, and a death warrant too."
He is the last talisman master, hidden away among ordinary folk, carrying the blood feud of his murdered family. Cursed by fate to be alone, he had intended to spend the rest of his life nursing his hatred. She has a pure-yang constitution, fragmented memories, and has spent half her life searching for the black-clad boy who once risked his life to protect her.
A pact of life and death binds two people whose fates are intertwined.
A haunted old mansion, a hypocritical Daoist sect hiding knives behind its back, and the person who slaughtered his entire family turns out to be a Daoist elder he once revered as a parent!
The Yin Talisman appears, reversing yin and yang. He lets down his guard for her and draws talismans in blood; she awakens her sacred constitution and uses yang energy to suppress evil.
From mutual wariness to sharing life and death, from seeking revenge alone to guarding the world side by side.
When extreme yin meets pure yang, fate finally brings them together; the Yin Talisman sets yin and yang in order, and good and evil both meet their due.
In this life, he is no longer a lonely spirit, and she is no longer a passing guest. His blood feud will be avenged, and together they will protect the warmth of everyday life.
Theme: Even if it means burning myself away, I will protect the one I love and the righteous path of the human world.