Set in the same universe that Consorts in the Palace, this story follows the imprisonment of the infamous Dragon of the Valley, Consort Dowager Kwon Jiyong, as he starts to secretly develop a new plot in the heart of the East Empire's Palace. A plot that Princes Jongin and Sehun have to discover and prevent before it is too late.  This story also reveals the origin and development of The Dragon's long-time affair with his Royal Guard, Captain Choi Seunhyung, and how they felt in love