The thousand-year-old castle on Wuyu Island in the north hides the secret of the Li family - generations of men have been "incense keepers". If the "incense keeper" cannot be found before the age of thirty, they will disappear into mist. Li Jingshen was cold and forbearing, guarding the family curse and century-old regrets, until the ancient book restorer Su Qingyan broke in with half a piece of iris silver jewelry. The cinnabar mole on her neck and the same eyebrows as the great-grandmother of the Li family made the silent castle stir up trouble again.
From the forbidden first kiss in the greenhouse, to the century-old diary opened in the library; from the fight against crazy obsessions in front of the altar, to the pieced together ancestral past in the old house, the two protect each other in the fog and curse. When the blue rosemary bloomed and the iris and silver ornaments merged into one, they finally understood: the so-called fate is never a bondage, but an affectionate agreement that spans a hundred years. In the end, the fog dispersed and the fragrance condensed, and Li Jingshen and Su Qingyan continued to write a happy ending of "the iris is intertwined, and the years are worry-free" in the fireworks of the town.
