Can love be powerful enough to change the nature of a demon disguised as a judge, or is it merely a flickering light in the depths of hell? The story of Kim Ga On and Kang Bit Na is not just a romance—it is a battle between justice, hatred, and the fragile boundary between good and evil.

Kang Bit Na: A Judge or a Demon in the Veil of Justice?
Kang Bit Na is a talented yet cold-blooded judge, infamous for her controversial rulings. She often hands down lenient sentences to criminals, sparking public outrage and raising questions about the fairness of the legal system. But this is only the surface of a much deeper mystery.
The truth is, Kang Bit Na is not just a judge—she is also an executor of justice in her own way. A “judge from hell,” willing to punish evildoers through means beyond the reach of the law. Those she seemingly “forgives” in court eventually face true terror once night falls. She invades their minds, forcing them to experience the suffering they inflicted upon their victims.
Her actions pose a chilling question: Is she a demon, or the ultimate symbol of absolute justice?
Love on the Edge of Good and Evil
Kim Ga On is a righteous detective who firmly believes in justice through the law. In stark contrast, Kang Bit Na has lost faith in the system, knowing that legality does not always equate to true fairness.

Their conflict is not just a difference in ideology but a constant emotional struggle.
- Ga On sees in Bit Na a deeply wounded soul, but also an extremely dangerous person.
- Bit Na is drawn to Ga On’s integrity, yet she understands that their love is an endless war.
Each case they handle together becomes a test of their beliefs—one side upholding justice through the law, while the other enforces it through her own methods. Their love is a fragile thread, always on the verge of snapping.
The Ending: Happiness or a Temporary Truce?
In the end, Kim Ga On and Kang Bit Na manage to be together. But is it truly a happy ending, or merely a temporary equilibrium before everything collapses?
- Has Kang Bit Na really abandoned her form of justice, or is she merely suppressing it for love?
- Can Kim Ga On fully accept her, knowing the demon within her has never truly disappeared?
Their story is more than just a love affair between a human and a demon—it is a moral dilemma about justice and ethics. The series ends with a lingering impact, leaving the audience to ponder:
Can love truly change the nature of a demon, or are there demons that even love cannot redeem?