The final battle between the Ago Union and Arthdal has come. Ta Gon prepares for a personal war. Tanya, Tae Al Ha, Sa Ya, and Eun Seom make one final move to protect what's most precious to them. Who will take over Arthdal?

Tan Ya who wants to change Arthdal's owner and Tae Al Ha who wants to protect Arthdal fight. 

Eun Seom's Ago Union and Tagon's Arthdal have the final battle in the Arth Forest.

The day of Tagon and Eun Seom's battle comes. Tagon faces a shocking truth.

They need to stop Tagon. A brutal night falls on Arthdal. Eun Seom advances close to Arthdal.

Eun Seom finds an unexpected breakthrough in despair. Saya's plan envelops Arthdal in fear. 

Saya tries to take over the Ago Union. With Tagon's orders, Arthdal faces a new crisis.

The last prophecy by Aramun is announced. Eunseom, Tanya, and Saya try to figure out what it means! 

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

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

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. 

Eight years has passed since Tagon took the throne as the second coming of Aramun. Eunseom succeeded in uniting the Ago clans as the second coming of Inaishingi and he leads them to the great war against Arthdal. Meanwhile, Saya must prove his worth to succeed Tagon.