Seo-yun, who discovered Choi Jeong-hak's body, begins to track down the culprit. Meanwhile, Han-shin is reviewing the evaluation data of the next female inmate to be considered for parole. In principle, a baby must leave the prison after 18 months and be separated from its mother...

Han-shin, who finally meets his senior prison guard, learns the truth about the drug smuggling incident at the upper prison three years ago. At that time, Dong-man, who had applied for outpatient treatment and came to the hospital, ended up leaving the hospital without permission. Han-shin and his gang noticed this and started chasing after Dong-man!