In Paris, her twin sister has vanished, leaving behind three chilling words: trust no one.

Shayna Darby is finally coming to terms with her parents’ deaths when she’s delivered another blow. The body of her estranged twin sister, Angela - the possible victim of a serial killer - has been pulled from the Seine. Putting what’s left of her life on hold, Shayna heads to Paris. But while cleaning out Angela’s apartment, Shayna makes a startling discovery: a coded message meant for her alone: Alive. Trust no one.

Taking the warning to heart, Shayna maintains the lie. She makes a positive ID on the remains and works to find out where - and why - her missing sister is hiding. Shayna retraces her sister’s footsteps and they lead her down into Paris’s underbelly.

As she gets closer to the truth - and to the killer - Shayna’s own life may now hang in the balance …