Go Tae Rim is a lawyer. He is arrogant and makes biting remarks, but he has a 100% winning rate. He can't even imagine ever losing a case and winning cases is the most important thing to him. His attorney's fee is obscenely high. Meanwhile, Seo Jae In is a gung-ho rookie lawyer. She wants to help clients trapped in unfair situations. Seo Jae In realizes that lawyers who do not win cases are useless and she decides to work with Go Tae Rim.