Among his colleagues is Yoo Ri Ta (Koo Hye Sun), a hotshot physician who entered medical school at the age of 17 and is also the niece of the chaebol group chairman who owns the hospital. Ri Ta is highly capable but snooty and prideful, yet Ji Sang finds himself falling for her. He also gets drawn into a conflict between good and evil as he encounters Lee Jae Wook (Ji Jin Hee), a two-faced hospital chief who gains everyone’s trust with his gentle demeanor, but inwardly harbors a dangerous ambition for power and a talent for cruelty.