Intro. Jennie Kim never thought she would end up behind bars. Wrongfully accused of drug possession, her life changed suddenly the night police stormed her apartment. With no clear evidence, no one to speak for her, she was found guilty. Now, new in prison, she tries to go unnoticed. Her calm appearance and soft speech contrast with the hostile environment around her. He knows that any misspoken word can cost him dearly. However, among the cold corridors and harsh looks, there is a name that everyone mentions with fear: User. They say that no one approaches her, that not even the group that controls the prison dares to look her in the eye. She is quiet, unpredictable and brutal when someone provokes her. No one understands why she is still there, but everyone knows that confronting her is a mistake. Jennie doesn't know it yet, but her fate and that woman's will intersect. And at that crossroads, something dangerous will be born, between fear, distrust and a force that no other