Orphaned at a young age, Yu Yoohui has always had the worst luck, even dying at a young age from a rare disease. But then, she awakens in the Joseon dynasty during the cruel reign of Lee Yoon, the most ruthless king in history. Now trapped in the body of a lowly servant, Yoohui is forced to serve the infamous tyrant, but nothing is as it seems within the palace, with secrets, lies, and dangerous desires running rampant. Can Yoohui survive the king's wrath and change the course of history, or will the bloody past consume her?