Meet PI Billie Walker – smart and sexy, with a dash of Mae West humour, she's a hard-boiled detective with a twist. World War II has left Billie Walker a widow, but she's determined not to rely on any man for her future so she re-opens her late father's detective agency. Billie's bread and butter is tailing cheating husbands – it's easy, pays the bills and she has a knack for it. But her latest case, the disappearance of a young man, is not proving straightforward ... Soon Billie is up to her stylish collar in bad men, and not just the cheating kind – these are the murdering kind. Smugglers. Players. Gangsters. Billie and her loyal assistant must pit their wits against the underworld of Sydney and find the young man before it's too late.