An antique shop owner received a mysterious wooden box on a rainy night. The bronze mirror in the box reflected a woman in a cheongsam from a hundred years ago. Lin Shen wiped the last ancient mirror. When he looked up, there was a man in black robe standing under the eaves of the glass door. He held a wooden box full of patina in his arms. The rainwater dripped down the corners of the box and onto the carved peach wood threshold of "Guyue Pavilion", leaving dark red traces.