In postwar London and Paris, the search for a missing husband puts Billie Walker on a collision course with an underground network of Nazi criminals. It's 1947. The world continues to grapple with the fallout of WWII, and former war reporter Billie Walker is finding her feet as an investigator. When a wealthy client hires Billie and her assistant Sam to track down her missing husband, the trail leads Billie back to London and Paris, where painful memories of her own husband's disappearance also lurk. As Billie's search for her client's husband takes her from the upper echelons of Paris' Ritz hotel to the dank basements of the infamous Paris morgue, she'll need to keep her gun at the ready, because something even more terrible than a few old memories might be following her around the City of Light...