It's 1946, and though war correspondent Billie Walker is happy to finally be home, for her the heady postwar days are tarnished by the loss of her father and the disappearance of her husband, Jack. To make matters worse, the newspapers are now sidelining her reporting talents to prioritise jobs for returning soldiers. Determined to take control of her own future, she reopens her late father's private investigation agency, and, slowly, the women of Sydney come knocking. At first, Billie's bread and butter is tailing cheating husbands. Then, a young man, the son of European immigrants, goes missing, and Billie finds herself on a dangerous new trail that will lead her to the highest levels of Sydney society, and down into its underworld. As the danger mounts and Billie realises that much more than one man's life is at stake, it becomes clear that, though the war was won, it is far from over.