Rona Leonard was only 20 years old when she walked out of her sister Fiona’s flat and disappeared. Six years later --- worn down by a tedious job, childcare and an aching absence in her life --- Fiona’s mundane existence is blown apart by the revelation that Rona had been working as a prostitute before she vanished. Driven to discover the truth, Fiona embarks on an obsessive quest to investigate the sex industry that claimed her sister. However, as she is drawn into this complex world, Fiona finds herself seduced by the power it offers women in a society determined to see them only as victims.