Lucia Stearon, the "Jewel Princess" whose bodily fluids turn into Jewels. Possessing a unique constitution that occurs once every 200 years, it is no exaggeration to say that her entire body is a great treasure; since she was young, she has literally offered her sweat, tears, and blood to the country. It was all for her family, for her country, and for the Prince she swore her love to—but Lucia was poisoned to death by the Prince on her wedding night. Killed without even knowing the reason, her consciousness faded away. However, when she came to, Lucia had returned to six months before the wedding. Confused, not knowing why time had turned back, Lucia resolves to live alone this time, determined not to repeat the same mistake.