Hours before leaving the country, Kang Si-yeong steps in as a correctional physician and saves a life with the helping hand of Cha Yo-han.

Lee Yu-jun warns Si-yeong about Yo-han. When she confronts Yo-han about his diagnosis and crime, he questions the source of her anger.

Yo-han's past precedes him at his new workplace. Dreading a painful future, a famous athlete makes a heart-stopping request.

Si-yeong begins to understand Yo-han's philosophy on pain management upon hearing the full account of the events from three years ago.

As patients fill the Pain Management Center, one in particular catches Yo-han's eye with his lack of symptoms. Son Seok-gi approaches Si-yeong.

Yo-han lets history convince a young patient to undergo major surgery. Si-yeong wins Yo-han's praises for finding answers through patients' stories.