A Queen Among Hwarang?

Hwarang is made out of the most beautiful men of Silla. But what happens when the queen of a neighboring kingdom enters as one of their swordsmanship and music tutor and her best friend as the assisting physician? What will happen if the people of Silla find out who they are? Will they both find love and hate in this new chapter of their lives? Will the queen ever get to go back to her kingdom and rule as the rightful queen?