A love story between a couple in their early thirties. It’s the story of two people who live in the same era but in different worlds. Oh Yun Joo (Han Hyo Joo) is a surgeon whose father is a famous comic book creator. One day, her father goes missing and she rushes to his workshop to look for him, and instead finds a strange man, Kang Chul (Lee Jong Suk) bathed in blood. She is kidnapped by him and taken to a different dimension.
The series will be simulcast in China. The story set up in the early of Goryeo regime. Hae Soo (IU), a 25 year old girl from modern era got transported back to Goryeo dynasty and got trapped in the conflicts and struggles between princes of Wang’s House. There, she falls in love with Wang So (Lee Joon Ki) who makes other people tremble with fear.