Watch: Song Joong Ki, Jang Dong Gun, Kim Ji Won, And Kim Ok Bin Fight For Their Lives In "Arthdal Chronicles" Preview

The stakes are higher than ever in Part 3 of tvN’s “Arthdal Chronicles!”

“Arthdal Chronicles” is a fantasy drama about heroes who write their own stories in the ancient, mythical land of Arth. It stars Song Joong Ki in the dual roles of Eun Seom and Sa Ya, half-human, half-Neanthal twins who grew up in vastly different backgrounds. Jang Dong Gun plays Ta Gon, a warrior with ambitions to become the king of Arth; Kim Ji Won plays Tanya, a shaman of the Wahan tribe; and Kim Ok Bin plays Taealha, Ta Gon’s lover and a politician with ambitions of her own.

Parts 1 and 2 of “Arthdal Chronicles” aired earlier this summer, but due to the large-scale production, “Hotel Del Luna” was scheduled to air between Parts 2 and 3.

In the new preview released by tvN, Ta Gon has gotten what he wants as he sits atop his throne. However, his life and throne are threatened when Eun Seom begins to gather power among the slaves and peasants of Arth as he fights back against the elite. While Ta Gon has so far kept his half-Neanthal heritage a secret from the world, his eyes shine purple as he prepares to go all out in fighting Eun Seom.

Meanwhile, Kim Ok Bin faces the threat of assassination from an unknown adversary, while Kim Ji Won struggles to adjust to her newfound power in Arthdal.

Part 3 of “Arthdal Chronicles” premieres on September 7.

Check out the preview below!