Selecting a Joseon Queen

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)