Upon finding Do Ti, 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 Do Ti run into a familiar face in Arthdal and make an alarming discovery. San Woong 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. Moo Baek seeks advice and is given a quest.