Lee Dong-wook plays the role of a specialist doctor in the emergency medical center at Sangguk University Hospital, named Lee Jin-woo, who is a doctor that values medical ethics. Seo Kang-joon plays the role of the general president of Sangguk University Hospital, Koo Seung-hyo, a cold character who believes that data is above all. Won Jin-ah plays the head of pediatrics, Lee Wan-ha. Yoo Jae-myung plays the director of the thoracic surgery center at Sangguk University, Jo Jong-won, who is confident in thoracic surgery and possesses a sense of mission as a doctor; he is opposed to the newly appointed general president of Sangguk University Hospital, Koo Seung-hyo, regarding hospital operations. Kim Seo-hyung plays the director of the neurosurgery center, Woo Si-hwa, who is raised by doctor parents and is a prodigy; she takes pride in her profession and abilities and is ambitious to become No. 1 in the industry. Lee Kyu-hyung plays Lee Jin-woo's (Lee Dong-wook's) brother, Lee San-woo, who is a specialized doctor in the plastic surgery review committee and has a disability in his leg due to his father's death in a car accident when he was young. Jung Bo-suk plays the dean and psychiatrist, Lee Bo-hun, of Sangguk University Hospital. The drama is written by Lee Soo-yeon, who previously worked on 'Secret Forest,' and directed by the teams behind 'My Mister' and 'Dear My Friends.' It narrates the power struggle in the hospital and human desires, and is expected to air on July 23.
