During WWII, the death camp at Treblinka had an escape, causing the Commandant at a similar camp in Sobibor to vow (actually threaten) that his camp would never experience the same thing. But those who were its captives, the Jewish laborers that had been spared from the ovens, knew that they were on borrowed time and that their only hope was to escape… the only question was how to do it. On October 14, 1943, members of the camp’s underground resistance succeeded in covertly killing eleven German officers and a number of Ukrainian guards. Of the 600 inmates in the camp, roughly 300 escaped, although most were later re-captured and killed. The escape forced the Nazis to close the death camp, dismantling it and planting a forest.

Maigret investigates the random murders of a Countess and a showgirl and discovers a dark secret that links their past lives at the Grand Hotel in Nice.