고려가 원나라의 세력에 굴복해 망국의 위기에 직면한 때, 고려 황실의 호위부대장 최영은 왕의 명을 받아 치명상을 입은 왕비를 치료할 의사를 찾으러 나선다. 우연히 시간을 뛰어넘어 600년 후의 한반도, 대한민국에 도착한 그는 성형외과 은수를 납치해 귀환한다. 그저 돈 벌고 평안하게 사는 게 목적이었던 은수는 하루아침에 혼란의 고려로 떨어지면서 수많은 어려움을 겪는다. 그리고 은수는 그때마다 자신을 지켜주는 젊은 전사, 최영과 사랑에 빠진다.
After being found in 918, the kingdom of Goryeo faced a critical existential crisis when the powerful Yuan dynasty tried to subjugate them. In the fictional setting of this drama, a warrior living in the timeline of Goryeo meets a plastic surgeon living in the present day. The plastic surgeon gets kidnapped by the warrior who got an order from the king to find a doctor who can cure the fatally injured queen. The two individuals who were not meant to coexist are brought together to fight their way through the ordeals on the land of Goryeo. The warrior makes a promise that he will return her to her world, but a scheming royal advisor persuades the king to force the surgeon to stay as she can be useful to him. There, the surgeon falls in love with the warrior who is the leader of the royal guard. In this era of change and chaos, love that transcends time and space blooms.