In the drama series, Kim Hee-Seon plays ambitious attorney Eulji Hae-Yi. Kim Young-Kwan will play her husband Ki Yoo-Jin. He is a family doctor with a dark side. Lastly, Kim Hae-Sook will play death row convict Jang Hwa-Sa. When she meets attorney Eulji Hae-Yi in room 9 at her prison, they somehow exchange bodies.
“Room Nine” will first air September, 2018, taking over tvN’s Saturday and Sunday 9PM time slot after “Mr. Sunshine.”