Based on the life of Dae Inseon, the last king of Balhae.
| Actor | Role |
|---|---|
| RReika HaruDae Inseon | Dae Inseon |
| SSera AyamiSewon | Sewon |
| NNono ReiaQueen Eunbin | Queen Eunbin |
 Itsuki ChihiroYaritsu Aboki | Yaritsu Aboki |
| YYumena RuneGovernor Mukcheol | Governor Mukcheol |
| MMomoka YukiTaepyeong | Taepyeong |
| NNanano AriGeumran's mother | Geumran's mother |
| HHiiragi AyatoGeneral Hyoshin | General Hyoshin |
| SShirakawa RiriGeumran | Geumran |
| RRuou RiaYaritsu Totsuyoku | Yaritsu Totsuyoku |
| MMariya SonataGeumran's father | Geumran's father |
| MMahiro RenForeign ambassador Baegu | Foreign ambassador Baegu |