When two kingdoms are going to be attacked, the Min and Jiso kingdoms have to figure out how to save their kingdom and people. When the crown prince and one hwarang have to work together quickly to save both of their kingdoms before time runs out. But while working together, What happens when the prince starts to fall in love? What if the hwarang knows the real truth about the min family? What will happen when two old enemies return wanting more than revenge? What happens if the queen of Kim's kingdom wants to overthrow? What will happen to both of them? Find out on The Crown Prince & The Hwarang!