A group of tired commuters have caught the last train home, ready to hop into their beds for the night. However, their train soon veers off-course and crashes into an abandoned tunnel. The three surviving commuters; withdrawn mother Yi Ling, her son Lucas, and student Janice, are forced to band together and survive the night, as well as avoid the mysterious monster hunting them. Yi Ling still suffers from flashbacks to the car accident that killed her husband and nearly took Lucas` life too. When Lucas is snatched away by the monster, her maternal instincts are tested, and Janice`s ideas of family are challenged as she remembers her difficult relationship with her estranged father. Back at the subway control headquarters, the engineers do their best to make sense of the situation and rescue the survivors.
Twenty-year-old Elya is a student and a future ecologist. One day, Matvey, the head of a construction company, comes to her university to talk about a development plan on the site of an old forest park. Elya does not hesitate to smash his project to smithereens. Matvey is intrigued by the girl's self-confidence and uses his usual methods of influence - he simply tries to "buy" her. But Elya doesn't need a sponsor. Then Matvey, surprised by her impregnability, offers Elya a bet: seven romantic days according to his rules. If after that the girl still decides to leave, he will refuse to build a skyscraper in the forest park. She agrees when Matvey really suspends the design work. Elya sees herself as something like the heroine of the film Pretty Woman, but Matvey turns out to be not at all the person she imagined.
The story revolves around a new female college student in a dormitory filled with mysterious occurrences due to the awakening of a demon through an incantation and curse that still holds a connection to her own past.