King Moo is the king of Bekje, but the king carries no real power and can't even protect his first wife Queen Sun-Hwa and his first son Ui-Ja. Because Queen Sun-Hwa is the daughter of a Silla king, Queen Sun-Hwa and her first son Ui-Ja are always fearful of being assassinated. On every attempt their guard Moo-Jin saves their lives. King Moo also has a second wife Sa Taek Bi. She is the daughter of the most powerful noble Sa Taek Ju Duk. In actuality, her father Sa Taek Ju Duk and Sa Taek Bi herself control Silla and created the secret group "Wi Jae Dan" to assassinate Queen Sun-Hwa and her son Prince Ui-Ja. The second wife Sa Taek Bi wants her son Kyo-Ki to ascend to the throne.