Yongcheonru is the grandest guesthouse in Joseon. Their motto is that the customer is the king. Yeongcheonru has four new interns and they have their own reasons why they work there.Lee Eun  is actually a Joseon prince, but he hides his identity and begins to work at Yongcheonru as an intern using the alias of Lee Eun-Ho. Hong Deok-Soo is a woman, but she disguises herself as a man. Her goal is to become the general manager of Yongcheonru and starts working there as an intern. Cheon Joon-Hwa is the successor of Yongcheonru. He doesn't have any interest in running Yongcheonru, but he is forced to work as an intern there by his father. Go Soo-Ra's family has been on the decline for a while now. In order to rebuild his family, he begins to work as an intern at Yongcheonru. His goal is to be promoted to an employee permanently. While working at Yongcheonru, these 4 interns share experiences and become friends.