Directed by Jin Chen, starring Li Zhou and Wu Ruofu. It tells the story of Crescent City Women's Prison. Three female prisoners in the same room: Mary: nicknamed "Black Butterfly", a famous Jiang Yang thief in Crescent City, was jailed. Lin Qiuyan: A college graduate killed her boyfriend because of emotional problems. He Xiaolian: A bank employee in Crescent City embezzled public funds for her husband's company. On a thunderstorm night, Mary escaped from prison while repairing the warehouse, and the whole prison was on emergency alert.