River Where the Moon Rises Season 1 Episode 18

It is now four years after Gochuga’s death, and Crown Prince Won sits on the throne of Goguryeo. Pyeonggang fights war after war to help the young king, but her brother seems to misunderstand her intentions. Meanwhile, Dal lives like a hermit in the woods, and Geon lives as a drunkard in Silla. However, he suddenly decides to return to Goguryeo.