After a chance encounter, Tanya starts to grasp the meaning of the dream. Tagon's plan upsets Taealha. Moo Baek learns something astounding about Eunseom.

Saya has chilling words for Taealha. Tagon strengthens his grip over Arthdal. Tanya receives news of Eunseom and wonders what Saya's dreams might mean.

Tanya proposes an alliance with saya that proves to be useful for them both, Eun Sum refuses to deny who he is, and ominous signs appear in Arthdal.