Although psychic Isabelle de Gray and FBI Special Agent Gavin "Mac" McMillan are definitely a couple, they didn't plan to be together 24/7. But when a serial killer known as the Chameleon takes a special interest in Isabelle, Mac refuses to leave her alone. Despite their strong love, their relationship is tested when the FBI, against Mac's wishes, asks Isabelle to act as bait. And while Isabelle is willing to do it, the plan unintentionally taps into Mac's darkest, deepest fear. With their relationship strained to the breaking point and Isabelle's life hanging in the balance, Mac finally realizes that every predator must have its prey.