Joseon Attorney: A Morality

Han-soo settles in Hanyang and opens an attorney's office. Being notorious for his rude attitude, he gets no customers for a long while. One day, a plum wine seller asks him to file a lawsuit against the leader of the biggest guild in Joseon, and the magistrate holds a court for this case.

Han-soo tricks Master Jang into standing as a witness for Pyo, a vicious criminal. He makes Master Jang make a false statement and get blamed for Pyo’s crime instead. Princess Yeon-joo decides to help Han-soo punish both Master Jang and Pyo. After seeing what Han-soo is capable of, she decides to use him for her future plans.

Lady Yeon, the wife of Commissioner Park, leaves her home to stay in Sowongak. It turns out that Commissioner Park abused her and intentionally killed her father to take all of his property. She wants to file a divorce suit against her husband, but it's difficult for a woman to do so in Joseon. Then Han-soo steps up to help her.

So-won misunderstands Han-soo's intention and fires him. She finds another attorney to defend Lady Yeon and tries gathering evidence against Commissioner Park. Han-soo also works behind So-won, convincing Myung-wol to testify for Lady Yeon. However, on the day of the trial, no attorney shows up to defend Lady Yeon.

After Commissioner Park dies, Han-soo searches his room and finds the jade dragon. Han-soo, Dong-chi, and So-won head to Cheongsan to find out who gave the jade dragon to Commissioner Park. Han-soo learns it was Lady Park's doing, so he heads to her house. However, he witnesses a murder scene when he gets there.

Han-soo comes up with a brilliant idea to save the newlywed bride, Young-sil. He makes the villagers turn against each other and confess. He even successfully calls Ji-seon to Cheongsan so he can report the murder case to the King well. Meanwhile, Yoo Je-se learns about Han-soo and realizes that all the cases he took weren't mere coincidence.

After So-won realizes who Han-soo is, she becomes devastated as he might not forgive her if she tells him the truth behind his parents' death. Han-soo asks Ji-seon to help him find the princess, but Ji-seon gives him a new case instead, which involves Lord Chu and Lord Chu's son.

Lord Chu deliberately cancels Lee Bong-sam's trial and does everything in his power to stop Han-soo. Just as when Han-soo was feeling helpless, So-won comes up with a brilliant idea to solve the case. Meanwhile, after Executive Minister Yoo learns about Lord Chu's son's case, he decides to take action.