A danger to herself or others. That's how FBI Agent Kate Walsh remembers Lady Lucy Barclay. Their last encounter left Kate with a question she couldn't shake. Was Lucy a victim caught in forces beyond her control or a calculating killer hiding behind privilege and charm? Kate never got the answer. Now Lucy is missing.
At the personal request of Lord Barclay, Kate and her partner, Agent Declan James, are summoned to London, far outside the FBI's jurisdiction. Barclay believes Kate is the only one who understands his daughter. Kate knows this may be her last chance to finally see Lucy clearly. Then a body turns up.
One of Lucy's friends is found dead, and the investigation explodes into a violent chase across Europe. Kate and Declan are always a step behind, following a trail of blood that leads far from aristocratic privilege into London's criminal underworld and beyond.
Lucy isn't just running. She's threatening to expose secrets buried inside Kate's own team-secrets that could end careers and expose the FBI. Lucy knows how to stay ahead. And she knows exactly where Kate is vulnerable.