Former criminal investigation consultant Shen Qingci was involved in the "liminal corridor" because of an old train ticket related to an unsolved case - a dangerous space full of rules and strange stories. The ghost of the midnight train, the faceless nurse in the closed hospital, and the double curse in the mirror apartment will be assimilated into abnormal NPCs that are permanently trapped if you are not careful. Only by breaking the rules can you return to the safe "transit station".
On the way to form a team, she met lively college student Qiao Lele, calm retired mechanic Lao Zhou, and even met high-level player Lu Shiyan. Wearing a black trench coat and a special silver ring, he can suppress rule pollution and resolve crises, but he keeps secrets about the past.
From the first trial on the midnight train, to the misunderstanding in the hospital due to old scars, to the backlash when he protected her in the second-hand shop, the two broke the barrier between life and death: she put down her mysophobia to treat his wounds, and he put away his distance to leave safety clues for her. The hot cocoa at the transit station and the mint tea in the book corner became a gentle refreshment between adventures. A tacit understanding gradually emerged and feelings surged.
As the high-level "domain" deepens, Shen Qingci discovers that the corridor is related to the unsolved case, and Lu Shiyan also pieces together his memory - he was the previous guardian of the corridor and failed to protect her grandfather. The "liminal core" of the final area is opened, and the rule of "sacrifice one person to close the corridor" comes. Can they hold on to the bottom line, find out the truth, and escape the cycle with their partners?
