In the humid and rainy southern town of Qingcheng, Ye Wanqing, a young cultural relic restorer, returned to his hometown to sort out his grandfather's belongings and found a rosewood box containing a strange ancient hairpin in the attic of his old house. At the same time, Su Yan, an Internet writer known for writing urban suspense stories, also came to this small town in search of material for a new book. A silver hairpin from the Tang Dynasty that can attract flocks of birds intertwines the fate of two strange women. They must uncover the secret behind the hairpin that spans half a century, and the source of the secret points to the most secretive past of this small town.
