Welcome to the liminal realm. This is the gap between the outside and the inside.
At midnight, the selected person will receive a wordless black book and be pulled into the terrifying mirror of reality - the threshold. The rules are simple: complete the night's escape mission and find the exit anchor before you can return to reality. The price is straightforward: if you die in the Threshold, you will die in the same way at the same time in reality, without exception.
Shen Ye, a forensic doctor from the Criminal Investigation Detachment, witnessed her twin sister Shen Xiao being torn apart by the "man in the mirror" when she was nineteen years old. Since then, she has shut down all emotions - she cannot cry, laugh or love. Seven years later, an anonymous letter pulled her into the threshold. There was only one line in the letter: "Shen Xiao is still alive and waiting for you on the tenth night."
In order to find her sister, Shen Ye stepped into the threshold realm. The inner circle of seven people, ten nights of life and death. Some people fell behind the door forever, some disappeared in the mirror, and some instinctively ran towards her on the edge of oblivion. As she dismantled the rules layer by layer and approached the truth step by step, she discovered——
It is Shen Xiao himself who creates the terrifying rules every night. The eternally moving core of the threshold is the lover who died because of her in the previous life.
At the end of the tenth night, Shen Ye raised his gun and pointed it at his sister. When the trigger was pulled, she finally shed tears for the first time. It turns out that she thought she didn't have a heart because she hadn't been hurt yet.
"Love is not a weakness. It's the only thing that can bring you back from Tenth Night."
