Pro Bono follows the journey of Kang David (Jung Kyung-ho), a confident and well-respected judge who has always lived for prestige and perfection. His world revolves around public image, success, and the pursuit of influence — until one fateful decision turns everything upside down. A controversial ruling leads to a scandal that strips him of his title, reputation, and everything he thought defined him.
Disgraced and directionless, David finds himself joining a small pro bono legal team — a department within a law firm dedicated to offering free legal services to those who can’t afford them. The work is humble, the clients are ordinary, and the pay is nonexistent, yet it’s here that David begins to rediscover the true purpose of law.
At the heart of this change is Park Ki-Bbeum (So Joo-yeon), a bright, idealistic lawyer who genuinely believes that justice should protect the powerless. She’s passionate, stubborn, and unafraid to challenge David’s cynical worldview. Their opposing philosophies often clash, creating both tension and humor, but over time, their partnership becomes one of mutual respect — and perhaps something deeper.
As the team takes on cases involving the marginalized and forgotten — from laborers wronged by corporations to single mothers fighting for custody — David learns that the law’s greatest victories aren’t always won in courtrooms but in compassion and courage.
But when a mysterious case arrives, David’s past comes roaring back. The client’s story is tied to the very scandal that destroyed him, forcing him to confront the truth behind his downfall. In a dramatic twist, he must decide between saving himself or standing up for justice, even if it means losing everything again.
Ultimately, Pro Bono is a powerful tale of redemption, humanity, and second chances — proving that real justice begins not with power, but with heart.
