Based on the popular Saeguk drama, Scarlet Heart Ryeo, revolves around our main antagonist 3rd Prince Wang Yo, who was cursed by a strange impregnation of a supernatural being, which bring humiliation upon the prideful and ambitious 3rd Prince of Goryeo and his mother, Queen Yoo and his maternal clans. This caused chaos amongst the Goryeo Citizen, nobles and commoners, who insisted Wang Yo's execution. Because of commitinh treason, the king insisted Wang Yo pay with his life, by giving birth to the child and face humiliation for the rest of his life. And so, the baby is born. Along the pregnancy, many lives of nobles being taken, especially the 3rd Princess of Goryeo, Seowon, Many assumed it is because of the cursed soon to be born princess. The king gives warning to Goryeo Citizens, not to mention anything about this incident or else they will suffer a severe punishment.  3rd Royal Heirress, Princess Hanhawon grew up into a sweet, pure and delicate princess who seeks for her father's warmth affection, enduring toxic lives being raised under care of her father who sees her as her competition and continuosly receiving mistreatment from her stepmother and half-sister, being the king's beloved loyal subject, and Queen Sinhye's best trainee. No one realised, she had been more than that.