River Where the Moon Rises S01E20 - The Battle at Adan Fortress Continues/Leaving the Palace

Part 1: King Yeongyang decides to send reinforcements to Adan Fortress where Pyeonggang and Dal fight to defend it. Dal commands Pyeonggang and Jin to take the wounded back to Pyeongyang Castle, but Pyeonggang has plans of her own. As he awaits the Silla army to attack, Dal receives a letter from King Jinheung instead. Part 2: Pyeonggang escapes the Silla army camp with Mo Yong and Geon. Dal rushes to save Pyeonggang, but when he arrives, Geon is fatally wounded. Leaving the two behind, Pyeonggang and Dal return to Adan Fortress. As they near their troops, they hear Goguryeo's trumpet of victory. However, they are soon faced with an ambush.