The first battle between Arthdal, led by Saya, and the united Ago forces, led by Eunseom, takes place in Hanchoa. Eunseom and the Ago forces gets overwhelmed by Arthdal's military power. Meanwhile, Tagon realizes the elevated status of Tanya as the second coming of Asa Sin and begins to feel threatened by her absolute power.

Arthdal gets shocked at the unexpected situation in the first battle with the Ago Union.

Prince Arok, the son of Tagon and Taealha, is abducted, and the Arthdal Palace is in an uproar.