A horrific murder upends the Chicago Prosecuting Attorney's Office when one of its own is suspected of the crime—leaving the accused fighting to keep his family together.

Marie-Claude Savard and Sébastien Trudel propose a new investigation into a legal case that captivated Quebec in the 1980s. On December 15, 1987, Michelle Perron, 45, was found dead in her car. Her husband, director Gilles Perron, was at the scene of the crime. Thirty-three years later, the identity of the murderer remains a mystery.

In the center of the plot is lawyer Avrutin, cynical, rich, with a good sense of humor, who loves to shock and provoke. He takes on the most hopeless cases and always wins. The patience of the local investigation authorities comes to an end when the lawyer releases the murderer of a policeman from the courtroom. The head of the investigative department instructs investigator Glebov to collect dirt on the lawyer and discredit him. In this, Glebov agrees to help his beloved, the scandalous journalist of criminal news Vernitskaya. Under the pretext of filming a report about Avrutin, she infiltrates his inner circle and secretly conducts a journalistic investigation.