Ten years ago, Palper (Taylor Schilling Taylor Schilling) met a female drug dealer Alex (Laura Prepon Laura Prepon) after graduating from college, and became a lover with her to travel around the world, and later participated in a drug transport operation at her request. Over time, Palper left Alex and lived a normal life. One day, she and her fiancé (Jason Biggs Jason Biggs) were told by the police that the drug trafficking case was uncovered ten years ago and Palper was arrested. Palper took the initiative to come to the women's prison for 15 months. Faced with the new environment of the prison, Palper, who had just arrived, felt overwhelmed. What's worse, she accidentally offended Aunt Red, the person in charge of the kitchen, and was retaliated by Aunt Red. Not only that, she also met her old girlfriend Alex again in prison. In this federal women's prison, Palper met all kinds of female prisoners and got a taste of "prison culture" for the first time. She will have to deal with a variety of problems. Although she met a group of outspoken female prisoners, her prison life would never be smooth sailing...