Yeo-won lost her parents at an early age.
It was from then on. She began to see things that were invisible to others.
Afterward, she lived with her grandmother, but due to their rocky relationship, Yeo-won left Inwol as soon as she became an adult.

Then, hearing news of her grandmother's illness, she returns to the countryside for the first time in a while.
At her grandmother's request to fetch some spring water, she climbs Mount Inwol—a place her late grandfather had strictly forbidden her from ever entering.

And there, she encounters a strange man... or rather, a strange being.

The man’s lips touched her eyes once more, then pulled away.
A faint, distant ache she had never experienced in her entire life forced a painful groan from her lips.

"It is karma. The karma of your ancestor who stole the fox demon's marble."

In contrast to Yeo-won, who was writhing in agony, the man whispered in a serene voice.

"Now, I will help you, so open your mouth."

She didn't care what it took.
If it could rid her of this pain, she would gladly surrender her very soul.

The man coiled his tongue around Yeo-won's hidden tongue, drawing it in deeply.
Then, as if by magic, the pain began to melt away.