Paris 1942. François Mercier is an ordinary man who only aspires to start a family with the woman he loves, Blanche. He is also the employee of a talented jeweler, Mr. Haffmann. But faced with the German occupation, the two men will have no other choice but to conclude an agreement whose consequences, over the months, will upset the fate of our three characters.

Nine translators have been picked by a ruthless publisher and locked in a luxury bunker to translate the highly anticipated book of a famous author in record time. Although the translators are confined to prevent any kind of leak because of the high financial stakes, a crisis erupts when someone posts the first 10 pages of the novel online and blackmails the publisher to pay 5 million euros. A hunt for the culprit inside the bunker unfolds.

An unexpected romance blooms after the the youngest daughter of a merchant who has fallen on hard times offers herself to the mysterious beast to which her father has become indebted.