Long ago, the six elite young men with bravery at heart and beauty like flowers, called Hwarangs, were tasked with protecting royalty (the king). During the chaos of rebellion, the six Hwarang have lost track of their young king (or queen).

Now, they've traveled forth in time... to become the hottest K-Pop boy band in all of history! Will it be enough to catch the attention of their lost king (or queen)?