Room No. 9

Eulji Hae-y, in charge of Jang Hwa-sa's retrial, reunites with her in Room No. 9.

Because of the Defibrillator Shock, the bodies of Hae-y and Hwa-sa are switched.

Hwa-sa witnesses Young-bae alive and plans to avenge Gi San. Hae-y tries to switch with Hwa-sa.

Hae-y's plan fails and tells Yoo-jin the truth. Hwa-sa's switch is almost revealed to Hyun-chul.

Hae-y proves her change. Hwa-sa drinks with Hyun-chul to prevent her from getting known to Gi San.

Hwa-sa determines to reveal the truth; Gi San is Young-bae. Gi San threatens her with a detective.

Yoo-jin persuades Hwa-sa to regain Hae-y's body, but she disappears just before the actual practice.

Yoo-jin operates a defibrillator to switch Hae-y and Hwa-sa's spirits but faces a crisis.

Knowing Hwa-sa's plan, Gi San tries to find and kill her. Yoo-jin asks Hae-y to take care of Hwa-sa.

Hae-y is arrested as a murder suspect of Hyun-chul. Bong-sam, feeling pity, helps her meet Hwa-sa.

Released, Hae-y is expelled from Damjang. With Chan-sung injured, Gi San forces Hae-y to betray.

Hae-y is threatened by Gi San and considers giving up on Hwa-sa's retrial. Gi San prepares switch.

Noticing Gi San's plan, Hae-y saves Yoo-jin with Hwa-sa. She finds evidence of Hae-y's corruption.

Hae-y and Hwa-sa succeed in proving the evidence capability of the testimony. Gi San visits Hwa-sa.

Gi San endangers Hae-y and Yoo-jin to try switch. In the retrial, she claims Hwa-sa's innocence.