In the twenty-sixth year of the Republic of China, the French Concession in Shanghai.
Shen Du, the owner of a second-hand bookstore, has a pair of "strange eyes" - he can read the buried truth from under the typeface of old newspapers. There was a shipwreck three years ago, with forty-seven people on board, and he was the only survivor. From that day on, he could see things he wasn't supposed to see.
One rainy night, a missing person notice from three years ago appeared on an old newspaper, and the handwriting was disappearing at a speed visible to the naked eye. At the same time, the sister of the missing person came to the door and brought a photo with two words engraved on the back: Save me.
All the clues point to the same place: No. 13 In Xinghuali, a theater that burned down three years ago. Under the ruins, the gongs and drums never stopped at midnight. In the bronze mirror next to the stage, there is something parasitic that should not exist. People in the troupe call it "guest of guests". It doesn't kill people, it collects shadows. For people sitting in seats A and 3, their shadows will be reflected in the mirror. Collect all seven and it will come out.
Three years ago, the seventh man left the scene with only half of his shadow taken away. The "guest" became furious and set fire to the theater. Now it's trapped in the mirror, still waiting. And it found Shen Du - a person who could see it.
For the being parasitic in the mirror, a pair of eyes that can see it is more precious than any shadow.
The show has started and the tickets have been given out. This time, the space left for the seventh shadow on Seat A3——
Shen Du's own name was written on it.