Description：Due to historical reasons, the naughty young man Park Hoon (Lee Jong Suk) spent his childhood, adolescence and youth in North Korea, where he met the beautiful girl Song Jae-hee (Chen Se-yeon), but fate shattered the young man's beautiful youth. In order to run towards freedom, the two parted ways. Park Hoon, who came to South Korea, met Mingyu Hospital by chance, and met Han Shengxi, a female anesthesiologist who looked exactly like Jae-hee. After receiving strict medical education in the north, coupled with the genes and talents inherited from his father, Park Hoon soon became an excellent surgeon in Mingyu Hospital. This young man with the label of "North Korean defector" will be with Shengxi, as well as Han Jae-joon (Park Hae-jin), the chief of thoracic surgery with the purpose of revenge, Wu Xiuxian (Kang So-ra), the beautiful daughter of the chairman of the hospital, and even his own body.