This drama is based on Chinese novel “Bu Bu Jing Xin” by Tong Hua which was originally published online in 2005 on Jinjiang Original Network. The novel also adapted into the chinese television series “Scarlet Heart” which was aired in Hunan Broadcasting System (HBS) from 2011-Sep-10 to 2011-Sep-29 and also “Scarlet Heart 2” which was aired in Zhejiang STV (ZJTV) from 2014-Apr-22 to 2014-May-07. This drama was fully pre-produced before airing which is a departure from the live-shoot production format that characterizes most Korean dramas. The Filming Began on 2016-Jan and Completed on 2016-June-30. The series will be simulcast in China. When a total eclipse of the sun takes place, a 21st-century woman, Go Ha Jin, is transported back in time to the Goryeo Dynasty of Korea. She wakes up in the body of 16-year-old Hae Soo, an aristocrat living with Lady Hae, her cousin who happens to be married to one of the sons of King Taejo. She soon befriends several of the princes, who find her carefree and exuberant attitude refreshing. Although she knows she should not get involved in palace intrigues over the succession to the throne, she inadvertently becomes a pawn in the struggle, as several of the Princes fall in love with her. Adapted from the Chinese novel “Bu Bu Jing Xin” (步步惊心) by Tong Hua (桐华).