由于历史的原因,顽皮青年朴勋(李钟硕 饰)在北朝鲜度过了童年、少年和青年时代,他在那里结识了美丽女孩宋在熙(陈世妍 饰),但命运却将年轻人的美好青春击得粉碎。为了奔向自由,二人生离死别。辗转来到韩国的朴勋,偶然的机缘与明宇医院结缘,更在这里 见到了和在熙一模一样的麻醉科女医生韩胜熙。在北方接受了严格的医疗教育,加上承自父亲的基因和天赋,朴勋很快成为明宇医院内独当一面的优秀外科医师。 这个有着“脱北者”标签的年轻人,将和胜熙以及怀着复仇目的的胸外科科长韩在俊(朴海镇 饰)、美丽的医院理事长之女吴秀贤(姜素拉 饰)乃至身边所有的人发生激烈碰撞……As a child, Park Hoon (Lee Jong-suk) and his father were kidnapped by North Korea. In North Korea, Park Hoon was trained to become a doctor by his father who was already a famous doctor. Park Hoon became a genius thoracic surgeon. He deeply fell in love with Jae Hee (Jin Se-yeon) in his high school. Park Hoon's father then died and he tried to flee to South Korea with Jae Hee, but lost in contact with her and at the end, he fled to South Korea alone, while looking for Jae Hee. In South Korea, Park Hoon begins to work as doctor in a top hospital Myungwoo University Hospital. Meanwhile, he found a girl that looks exactly like Jae Hee, Doctor Han Seung Hee, who claimed to not know Park Hoon. Then it appears that she's involved in a secret mission with a man who hates Park Hoon back in North Korea.