Hidden Light: Vanished on the Thirteenth Floor

In this sleepless city, the lights never go out, but the shadows deep in people's hearts never fade.

Lin Yifan, a young criminal psychologist, senses something unsettling behind what appears to be an ordinary suicide. As his investigation deepens, he discovers it is not an isolated case. Behind every seemingly accidental death is an unknown “guide.”

Meanwhile, a social experiment on the “boundaries of morality” is quietly unfolding. Awakened consciences, repressed desires, and tempting evil impulses intertwine at the heart of this urban crisis. Lin Yifan must feel his way through the fog to find the truth, only to discover that its price may be confronting the side of himself he least wants to face.