After two years of turmoil brought on by an unidentifiable disease that dramatically comes to an end, the government plans to hold an experimental trial where the people are the judges. Kang Yo Han, the presiding judge of the experiment, is known for his unforgiving ways of justice. However, is justice what he genuinely intends? The newly appointed presiding judge, Associate Judge Kim Ga On, starts to suspect Judge Kang, whom he admires.

Judge Kang Yo Han yawns as a victim weeps in front of him. As everyone applauds him for his sentence, Judge Kim Ga On's distrust in him deepens. Although Judge Kang senses Ga On's skepticism, he still invites him into his dazzling world. A tug of war between the enigmatic Kang Yo Han and the mystified Kim Ga On begins.

An explosion in a judge's office shocks the entire nation. Was this an act of terror, or was it someone's warning message to Yo Han? However, Yo Han continues to race towards justice. What is the next trial he has prepared? Meanwhile, Ga On, who had lost consciousness while saving Yo Han, wakes up in a quiet mansion.

With new information, Ga On falls deeper into confusion. He and Soo Hyun investigate Yo Han's past, and Lee Young Min fails to stop the indictment against him. Meanwhile, Cha Kyung Hee gets engulfed with anger against Yo Han and tries to figure out how to save her son.

Ga On returns and starts working with Yo Han and Jin Joo again. His fans and the public welcome his comeback. Kyung Hee secretly visits his son in prison and watches him in grave pain. Then, Sun Ah comes up with a new strategy for Kyung Hee to tackle the situation. Meanwhile, a famous actor who has a young daughter is accused of committing sexual violence against his female colleagues, and the live trial starts.