
In a mythical land called Arth, the inhabitants of the ancient city of Arthdal and its surrounding regions vie for power as they build a new society.

Sanung and the Saram propose an alliance with the blue-eyed Neanthal, but when things don’t go as expected, Tagon takes command of the Great Hunt.

The villagers cast suspicion on Eunseom upon learning that he has dreams. Tanya questions her destiny. Tagon greets his men in an unlikely place.

Upon finding Doti, Eunseom devises a plan to rescue the Wahan and is dismayed to learn the significance of Igutu - and what this means for him.

Eunseom and Doti run into a familiar face in Arthdal and make an alarming discovery. Sanung grows suspicious of his son. Tanya stands up for her tribe.

As Tagon’s declaration ripples through Arthdal, Eunseom contemplates the significance of what he saw. Mubaek seeks advice and is given a quest.

Taealha counsels Tagon about the impending meeting with Eunseom. Mihol tries to persuade Asa Ron to expose the truth. Tanya sees a mystifying vision.

After a chance encounter, Tanya starts to grasp the meaning of the dream. Tagon’s plan upsets Taealha. Mubaek 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, Eunseom refuses to deny who he is, and ominous signs appear in Arthdal.

Tagon visits Tanya and asks about the Wahan. After hearing about Tanya's dreams, Saya decides to tell her his story. Mubaek comes across something odd.
Created by: Kim Won-suk, Sang-yeon Park, Kim Young-hyun
Available on: tvN