Kang Bit-na, a judge possessed by a demon, meets Detective Han Da-on and starts punishing criminals.

Demon Justitia possesses the body of Judge Kang Bit-na and must punish criminals.

Da-on receives unexpected news while protecting Min-jeong. Bitn-a's first infernal trial begins.

While reveling in her string of executions, Bit-na encounters someone unexpected.

Bit-na’s infernal trial begins once again for Bae Jayeong’s misdeeds. “Bad adults must be punished.”

While trailing Bi-tna, Da-on finds himself at a secret demons’ meeting. A horrific incident occurs.

“Why do you keep interfering?” Will Bit-na escape Da-on and conclude her infernal trial?

So-young suspects serial killer J is back. Meanwhile, Da-on remains suspicious about Bit-na’s identity.

So-young disappears. Bit-na worries for Da-on but concludes Choi Won-joong’s infernal trial as a demon.

Da-on vows revenge against serial killer J and joins forces with demon Bit-na.

Detective J’s true identity is uncovered. Bit-na encounters emotions she’s never wanted to face.

Bit-na loses her powers for breaking the rules but still heads to Jae-geol’s home to uncover J.

A body is found in a burned car, and the truth is revealed. Who is J?

Finally, J’s trial begins. At a crossroads, Bit-na must make a life-or-death choice.

J commits another evil act after escaping, and Bit-na is dragged to Hell. Will this be the end?