Dundee, Scotland; December 1919 Big Aggie's girls are much in demand in her notorious house of pleasure. When one of her most popular girls is savagely killed it sparks off a mystery with wide-reaching effects. Why was Lily killed? Was it a crime of passion or something more calculated? And what secrets was Lily hiding? Dundee's first policewoman, Kirsty Campbell, thinks it's more than a crime of passion. She's keen to prove herself to DI Jamie Brewster by cracking the case. To find the killer, she must unravel Lily's secrets - but it's only when her own life is in danger that she learns others hide secrets too. It is a tortuous trail where Kirsty faces danger before the mystery is solved.