The story unfolds at Yongcheonru, Joseon's grandest inn, where four interns navigate personal ambitions and hidden secrets. Prince Lee Eun, disguised as Lee Eun-ho, seeks to understand his kingdom while Hong Deok-soo challenges gender norms. Their journey intertwines with Cheon Jun-hwa and Go Soo-ra, revealing the complexities of love and loyalty amidst a backdrop of historical intrigue.