Chun Yu is a university student whose life is thrown into unspeakable turmoil when she receives a chilling text message that reads: “I know what the 19th floor of hell is.” Soon, she realizes that other students on campus have received the very same message. Before long, she learns that she has been sucked into the macabre reality of a mobile game that takes place in a ghostly “haunted” building where every floor is full of dangers, horrors, and terrifying secrets.Watch drama online for free.