Sumptuous brothels and respectable mansions. When Jack's ex father-in-law, Deputy Commissioner George Sanderson, is implicated in the brutal murder of a prostitute, Jack is determined to clear his name. Despite strict instruction from Jack not to meddle in his case - which also reintroduces Jack's ex-wife, Rose - Phryne decides to perfect her 'fan dance' in order to go undercover at the gentleman's club of the notorious Madam Lyon.