The heroine of the series "Judge vs. Judge" is a young principled lawyer named Lee Jung-joo, who works in a Seoul court. She is guided by her personal civil principles and justice, which sometimes conflict with official laws. In the same building, there is another judge - reserved and strict Sa Ui-hyun, for whom nothing is higher or more important than the letter of the law. One day, these very different colleagues are forced to become partners in order to unravel a decade-old murder.