New police officer Lin Wei joins a women's prison, hoping to escape the life-and-death pressures of working in a hospital. But she is unexpectedly assigned to the ward for the elderly, sick, and disabled, an isolated place within the high walls that lies closest to life's end. Over five years, with a doctor's eye and a police officer's sense of duty, she witnesses the shattered lives and struggles of humanity behind the “female convicts” defined by society's labels.