Yun, the best concubine of Joseon, is ordered by the king to investigate the five concubines who did not submit their virginity certificates to the selection order. He makes a contract with Seo Kyung, the most talented of the concubines who sells goods to the concubines, to find the one who will become the queen, and they pretend to be a married couple and begin their journey to find the queen...

(Source: Naver, translated)