Xin'an, Zhan Xinjia

A mysterious key brings Xin'an in 2025 back to Yuncheng in 2005. There she met Lin Baizhou, and they searched for the truth side by side until she disappeared from his eyes. Returning to Xin'an in 2025, in the dusty old archives room, she used the key to open the filing cabinet and found what he left behind: case files, notes and a letter to her. "Xin'an: Seeing words is like meeting each other, showing good faith..."