Moo-Young (Kim Ok-Vin) is the daughter of King Yeongnyu of Goguryeo. Her father King Yeongnyu gets killed by nobleman Yeon Gaesomun. Moo-Young later falls in love with Yeon Choong (Uhm Tae-Woong) who is Yeon Gaesomun’s son. She becomes torn between revenge and love.