The historic Sentier district was once filled with fashionable mansions but is now a nearly treeless neighbourhood housing the "rag" trade, Paris's Silicon Valley, and sleazy night clubs. Aimee is drawn to the area when a woman, just released from prison, tells her that she knew Aimee's long lost mother. To Aimee's astonishment and horror she learns that they were in prison together and that her mother was a member of a notorious 1970s Red terrorist gang. Before Aimee can garner any more information the woman is murdered. Desperate to find her mother, Aimee becomes embroiled with resurgent terrorists, no longer motivated by ideals, but ruthlessly seeking hidden loot, which also seems to have disappeared.