November, 2001: in the wake of 9/11, Paris is living in a state of heightened fear, with constant bomb alerts and heightened ethnic tension. For Aim�e Leduc, November is bittersweet: the anniversary of her father's death and her daughter's third birthday fall on the same day. A gathering for family and friends is disrupted when a bomb goes off at the police laboratory--and Boris Viard, the partner of Aim�e's friend Michou, is found unconscious at the scene of the crime, his fingerprints on the bomb fragments.

Aim�e doesn't believe Boris set the bomb. In an effort to prove him not guilty, she battles the police and his own lab colleagues, collecting conflicting eyewitness reports. When a member of the French secret service drafts Aim�e to help investigate possible links to an Iranian Revolutionary guard and fugitive radicals who bombed Interpol in the 1980s, Aim�e uncovers ties to a cold case of her father's. As Aim�e scours the streets of Teheran-sur-Seine trying to learn the truth, she has to ask herself if she should succumb to pressure from Chloe's biological father and move them out to his farm in Brittany.