Ryuga Hwa, a demon hunter with extraordinary divine powers who won't refuse any request if money is involved! She was expelled from the demon hunter association 'Bulgasal' for violating the prohibition of side jobs. Meanwhile, Emperor Jin Yeo-mong hears that the people's anxiety is growing daily due to the increasing appearance of demons outside the capital. The barrier of the Five Provinces surrounding Haesaguk is becoming unstable in a dangerous situation. In this situation, Left Deputy Minister Yi Sa-wol visits the Ghost Warrior Jungrangjang Kang Yi-so, and makes an unexpected request to escort the Emperor's prospective son-in-law to the capital. Ghost Warrior Kang Yi-so suddenly embarks on a long journey with his subordinates to escort Song Bi-yeon, a beautiful (?) trainee disciple of the refugee relief association 'Jinyulhoe'. During the journey, Kang Yi-so coincidentally encounters Ryuga Hwa, his former disciple, while fighting a demon that appears. Ryuga Hwa joins the expedition upon Kang Yi-so's proposal to work together. Finally, the expedition, which arrives at Jinyulhoe's Wondam Daeseonsa where the prospective son-in-law Song Bi-yeon is, faces another incident there. A series of large and small incidents occur one after another... Will the expedition be able to successfully escort the prospective son-in-law Song Bi-yeon to the capital?