Geun Jungwon is the most famous successful and well-settled businessman. Geun Eun-Hee is also known as a famous surgeon. After completing their university they got married and continued their careers. They were happy in their little world but one-day Eun-Hee met Seon Soon-Ja who was attempting suicide. Eun-Hee saved her and brought her into their house. Jungwon wasn't happy with Eun-Hee's decision as he felt something weird toward Seon Soon-Ja but his love for his wife more than anything. Jungwon respected Eun-Hee's decision and agreed to let Soon-Ja live in their house, and then something changed all of their lives, something which they never imagined.
Jay came back to life. What is actually happened? He still remembers exactly how he died, before... he died because someone shot him right in the heart, and Jay could vaguely see the culprit. That was JungWon, his lovely lil brother. But why? Why is JungWon so heartless? After destroying their family business by selling their company information, wouldn't that be enough? And after doing all that, he still has the heart to kill me.. even mom and dad won't be at peace there. It seems like it's my destiny, to change everything... to change the injustice that has befallen to our family, and of course to... Avenge the past life.
JungWon, a young man from the 21st century, a member of a famous boy group in South Korea, suddenly moved to the Goryeo era-! After waking up from his nap, JungWon finds himself going to the Goryeo era. Being a prince who is sickly and worse more he have to marry a prince of the Mongols who is the original enemy of Goryeo-!! What should he do?!