The Ran Empire, a country that carries 500 long years of history and the daughter of one of the four major families who aided the emperor at the time of its founding. The daughter who was abandoned as soon as she was born and was raised in the slums. In front of Salk, who's on the verge of being sold as a concubine to a rotten old man, is a noble young lady. A lady who looks identical to Salk and is claiming to be her twin sister. Hee-yeon, whose life is in danger, asks her twin sister, Salk, who she met for the first time after 19 years...