Nine o'clock at night.

Three hours after Zhu Shan disappeared.

In the police station, Ling Xiao was sitting on a chair. He arched his back, bent his elbows and rested them on his knees, buried his head with his eyes closed, and rested his forehead on his palms.

From time to time someone passed by him.

Those flustered and urgent steps would make his heart sink and make his eyelids tremble involuntarily.

"Ling Lu." Officer Song walked out of the back ...