The detective story takes place in 1966. Young woman Nina is transferred from a small law firm to the legendary Branch No. 1. Metlitskaya didn't have a chance to distinguish herself in her previous legal service. While working on new cases, the girl demonstrates sharp wit and a unique investigative methodology. Nina is tasked with defending a young man accused of rape, a woman who killed her partner, an American citizen, and many others. The girl's talent will make her one of the most famous lawyers.