Surviving in Arthdal means knowing how to choose the side that holds power. Taealha is attacked, and Tagon silences those who’ve uncovered his secret.

Tagon becomes enraged when he discovers Mihol is behind Tanya’s abduction, and the two later meet to discuss her fate. Eunseom orchestrates an escape.

Tanya becomes overwhelmed by Arthdal’s reception of her new role, and demands that Taealha and Tagon keep their end of the bargain.

Mihol informs Tagon about the finer points of being a king. Saya’s appearance bewilders the Wahan. Eunseom receives help from the Neanthal.

The final battle between the Ago Union and Arthdal has come. Tagon prepares for a personal war. Tanya, Taealha, Saya, and Eunseom make one final move to protect what's most precious to them. Who will take over Arthdal?

Eunseom wrestles with a proposition and ponders how he’ll find Tanya. Saya plots a strategy for Tagon to be king. Mihol gives Taealha a stern warning.

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

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

Tanya tries to uphold the ways of the Wahan but is dismayed to find that they have changed. Tagon’s guards make a gruesome discovery.

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

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

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

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.

The united Ago forces faces an unforeseen situation, causing anxiety among its leadership that the alliance, which has been unified for 200 years, may fall apart. Meanwhile, Tanya is confronted with a truly incredible situation.

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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.

Harim makes a startling confession to Mubaek. Chaeeun goes to see Tanya and tells her the truth about Eunseom. Mihol offers Taealha a way out.

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.

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

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.

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

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.

Tanya receives word of the Wahan and meets someone who’s seen Eunseom. Saya grows increasingly leery of those around him. Tagon gets what he wants.

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Tanya who wants to change Arthdal's owner and Taealha who wants to protect Arthdal fight.