The real purpose of Cai Zhai coming to this factory is to inquire about the whereabouts of her fiancé, who has infiltrated the factory in search of the truth. In order to expose the conspiracy of the secret factory and save her fiancé, Cai Zhai decides to bet her own body... Burdened with massive debt, Cai Zhai is brought to a steel factory that sees no sunlight. With her own life in disarray, she hears that her father is critically ill and takes a month off to return from the south to the north. After forty days of 24-hour bedside care, her physical and financial conditions have reached their limit, and she heartlessly leaves... Ten days later, her father passes away. He really doesn’t give me a chance; is he mad at me? And that place is the rumored underground factory that harbors serious criminals and illegal immigrants! Cai Zhai is arranged by the factory supervisor to work with a group of girls. Here, anyone who violates the rules will be taken to the supervisor for abuse and humiliation, with no exceptions! The real purpose of Cai Zhai coming to this factory is to inquire about the whereabouts of her fiancé, who has infiltrated the factory in search of the truth. In order to expose the conspiracy of the secret factory and save her fiancé, Cai Zhai decides to bet her own body...
