"We’ve got to bring the emperor down from the within, slowly."
To do that, the assassin Sohwa infiltrates the palace, disguising herself as a court lady to seduce the tyrant YuGeon.
But YuGeon, with his obsessive mysophobia and violent madness, never allows a woman near him.
"If you touch me, you'll be filthy too."
On one of his manic episodes at night (chimya) sohwa stands watch outside his chambers, waiting for the right moment to strike.
And when she finally does, YuGeon, once untouchable, starts falling deeper into obsession with her.