To catch the perfect killer, she must become the perfect victim.

After discovering that her estranged sister is missing, Carolina McKay heads to Pittsburgh where she stumbles into an FBI investigation. The same time her sister, Scarlet, vanished, so did $300,000. And Scarlet is the prime suspect.

But if there's one thing Carolina's good at, it's digging. When she delves into her sister's sordid private life, she discovers that Scarlet has a separate, and dangerous, identity.

And in her other life, the darkness is winning.

As Carolina enters the seedy world of high end sex workers, she soon finds herself in over her head with her life hanging in the balance.

She's determined to uncover what happened to Scarlet, but will the price be trading places with her?