Synopsis: Three years following the events of first season, Kim Sa-bu visits Geosan University Hospital to recruit a general surgeon. He finds Seo Woo-jin (Ahn Hyo-seop), a doctor with a troubled past who is ostracized by his fellow doctors, and offers him the job. In the meantime, Cha Eun-jae (Lee Sung-kyung) is suspended after making another mistake in the operation room and has no other choice but to follow the two doctors to Doldam Hospital.