** spoiler alert ** Aimee Leduc is hired by the rabbi of a Marais synagogue to decode a file and deliver it to an elderly Jewish woman Lili Stein. The file is a photo and the delivery of it proves problematic. She finds Lili Stein dead with a stylized swastika carved on her forehead; as was done to WW2 women who associated/slept with German men.

It soon follows that the rabbi, Sol Hecht, becomes the 2nd victim; recovering from being pushed into a bus, a syringe of air is displaced into his IV.

Aimee soon becomes embroiled with investigating WW2 collaborators and the fallout from the Vel d'Hiver action in 1942. She crosses paths with neo-Nazi groups and the government's security office.

In tandem with Aimee's investigation, we follow Helmuth, a German trade delegate. He is being "run" by a hidden Nazi group to push through, unanimously, a very restrictive immigration bill. The bill would allow for summary incarceration of illegals. He is not comfortable returning to Paris as he was stationed there during WW2. During the occupation, he even fell in love with a local Jewish girl, Sarah. Sarah, we find is alive and gave birth to their son. With Liberation, she was, herself, mutilated - a swastika on her forehead. Due to lack of proper nutrition, Sarah was unable to care for her son Jakob (now Thierry) and asked for a friend who had just lost her child to take him. Thierry's parents are mild xenophobes and he grows to become a neo-Nazi.

Meanwhile, Thierry finds Sarah and kidnaps her and brings her to the catacombs where she and Helmut used to meet. Helmut arrives, armed, and shoots at Thierry when he believes him ready to knife Sarah. Sarah steps in front of Thierry and there is somewhat of a revelation for Thierry in that action.

The conclusion finds that a high level government minister was a WW2 denouncer, not for principle, but of overall hate and for money. In a fight with Aimee in the offices of her friend Martine's newspaper, they fall through a glass skylight. Aimee survives, the minister does not.

* Great premise for a plot. Two things missing. First, Vel d'Hiver, was run by the French police not the Germans. The author provided little information on the process and the conditions in the Velodrome prior to the Jews being deported to the camps. Second, the book would be more rounded if the material were more expanded upon.