Eulji Hae-Yi (Kim Hee-Seon) is a lawyer at a big law firm. She flatters people who hold power, but looks down upon those who are poor. Eulji Hae-Yi does anything to win her cases. She will soon receive a promotion to senior partner at the law firm. Her boyfriend is Ki Yoo-Jin (Kim Young-Kwang). He works as a family medicine doctor. He seems like a gentleman, but he hides his cruelty.
Meanwhile, Eulji Hae-Yi meets death-row convict Jang Hwa-Sa (Kim Hae-Sook) in room 9 in the prison's visitation area. In room 9, when Eulji Hae-Yi meets Jang Hwa-Sa, their bodies are exchanged.