Jules Lermina is a French writer, student and follower of Alexandre Dumas, who made a significant contribution to the development of detective literature. The novel “One Hundred Thousand Francs as a Reward” is one of the most striking works of the writer. The celebration of the marriage of Count Quéroux and the beautiful Mademoiselle Hélène Savernier suddenly turns into a nightmare. The newly minted Countess Kerou becomes the victim of a monstrous crime. The town of Tremblay is gripped by horror, suspicion falls on innocent people... At the same time, the beautiful courtesan Nana Soleil disappears. Her lover announces a reward of one hundred thousand francs to anyone who can point out the trail of the missing woman. Is there a connection between the two terrible events? And who will undertake to unravel this dark matter?