"Scarlet Heart: Ryeo" is a South Korean television series that aired in 2016. It is a historical romance drama based on the Chinese novel "Bu Bu Jing Xin." The story follows Go Ha-jin, a modern woman who is transported back to the Goryeo Dynasty during the reign of King Wang So. She becomes entangled in the lives of the royal family and their political struggles. The series features a complex love story involving multiple princes, particularly Wang So, who is known for his scarred face and fierce personality. As Go Ha-jin navigates court intrigues and her feelings for the princes, she must also confront the challenges of changing history and her own fate.