Jin Hee's impulsive decision almost costs Chang Min his life. An unexpected power outage in the hospital threatens the life of a patient.

Stepping up to try and save a patients life could come back to hurt Jin Hee. Chang Min learns the truth about Ah Reum's identity.

Jin Hee is assigned to monitor Chang Min's mother when she's admitted to the hospital. Meanwhile, Jin Hee and Chang Min's elevator surgery has consequences that affect the ER.