French period crime drama. The French Republic is in turmoil as rumours spread about the release from Devil's Island of Dreyfus, arrested for spying.

French period crime drama. Meg starts spying for Puybaraud and is told to infiltrate the Guérin family, who are behind the anti-Semitic league.

Jouin visits Jeanne Chauvin to ask for help in translating some correspondence. Puybaraud has discovered Madame Lepine's weakness.

In the days leading up to the Dreyfus retrial, tensions are running high in the streets of Paris. Jouin takes a gamble and breaks a promise to Jeanne. Lepine makes a public show of his authority.

Meg falls for army intelligence officer Gabriel Sabran, the same man Jouin is pursuing in his investigation into Josephine Berger's murder.

When Meg Steinheil is abducted, her husband asks Fiersi for help. Lepine and Cochefert are made aware of Puybaraud's double-dealing.

Tensions run high on Rue Chabrol. Encircled by the police, Guérin is protected by the butchers of La Villette. He waits for the trap to close in on Lépine and his men so that he can take power with his nationalist and monarchist allies.

Guérin and his men remain holed up in their HQ, but inclement weather disperses their supporters in the streets. An exhausted Fiersi is caught by Puybaraud's men and is persuaded to undertake one final commission for his boss.