Moon Lovers: Scarlet Heart Ryeo (2016) [Dar-ui yeon-in – Bobogyeongsim ryeo] is a South Korean fantasy, history, drama television series based on the Chinese novel Bu Bu Jing Xin. The series stars Lee Joon Gi, IU, Kang Ha Neul, and Hong Jong Hyun. It aired on SBS from August 29, 2016 through November 1, 2016.
In Moon Lovers: Scarlet Heart Ryeo there is a total solar eclipse and a 25-year-old 21st-century woman, Go Ha-jin (Lee Ji-eun), is transported back in time to the Goryeo Dynasty. She wakes up in the year of 941 in the body of Hae Soo, among the many royal princes of the ruling Wang family. She initially falls in love with the gentle and warm-hearted 8th Prince Wang Wook (Kang Ha-neul), and later Wang So (Lee Joon-gi), the fearsome 4th Prince who hides his face behind a mask and is given the derogatory label of “wolf dog.” As the story develops, Hae Soo finds herself unwittingly caught between the rivalry and politics among the princes over the fight for the throne.