As the tribal age of darkness and incantation comes to its end, with the birth of new kingdoms, the Kingdom of Shilla led by PARK Hyokkose destroys Auta Tribe, a tribe that worships the Great Tree. The vast hole where the Great Tree once stood is filled with the blood and hatred of Auta Tribe and it turns into a dark lake. Hyokkose thrusts the Sword into the Great Tree to seal off the sorcery power of Auta Tribe.
1000 years later...
In the last years of Queen Chinsong's reign, the Unified Kingdom of Shilla has deteriorated into a weakening nation with ongoing wars and the failing frontiers. It is at the brink of a complete destruction. General Biharang, a trusted warrior of Queen Chinsong, faithfully fights for his country but after years of countless battles, his only wish is to live a quiet life with his beloved woman Jaunbie. One day, while General Biharang is out in another battle, unknown assassins attempt to murder Jaunbie. As she tries to escape from them, she accidentally throws herself into the lake where the malice spirit of Auta Tribe lies deep within.
The evil spirit of Auta decides to revenge against the Shilla Dynasty through Jaunbie, who had fallen into the lake. 'When darkness of the night hides the moon of thousands years of hatred, the great revenge will begin. And the greatest love will become the greatest tragedy.