For ten years, the woman in the red dress had been lying in the file in his drawer, unclaimed and unforgotten.
Criminal police captain Shen Du took over a bizarre murder case: a young woman was killed and her body was dumped in an abandoned residential building. The face of the deceased was unusually peaceful, she was wearing an unlabeled red skirt, and there was a note with "The Seventh" written on it hidden in her pocket.
What sent shivers down his spine was that the handwriting on the note was exactly the same as the note left in a cold case ten years ago. The deceased in that case was also wearing a red dress, had the same calm face, and also had no identity.
Ten years passed between the two cases, but the murderer seemed to have never left.
As the investigation deepened, Shen Du found that the identities of all the victims were surprisingly consistent - they were all young women in their mid-twenties, living alone, and had lost contact with their families for more than a year. They are like people who have slipped through the cracks of society. No one reports the crime to look for them, and no one even notices their existence.
A serial killer who kills people in the same way for a whole decade and always gets away with it.
Why did he choose these women?
Why leave that weird smile on the face of the dead?
What does "seventh" mean - a count, or a countdown?
Shen Du and his team approached the truth step by step, but found that they were walking into a web that had been woven for ten years. And at the center of this web is a person from ten years ago, a person who should have been dead long ago.
When all the clues point to the same direction, Shen Ducai
