Will he help find her sister’s killer . . . or lead the killer to her door? When FBI Agent Kaitlyn Knight discovers her brother-in-law is Vyper—the notorious cyber-criminal and murderer wanted by the FBI—Kait doesn’t question her duty to arrest him. But when he murders her sister in front of her, leaving her infant niece motherless, Kait vows to hunt him down and bring him to justice while raising the baby. Three years later, and not even a whisper of a lead in her search, Kait is about to give up hope of ever finding Vyper. All of that changes when he goes on a murderous spree taunting Kait with clues that she and homicide detective Sam Murdock must solve before her devious brother-in-law takes another life. As the body count rises, Sam discovers the killing spree is really about striking back at Kait. He must put everything on the line—including the relationship he’s developed with Kait—to ensure her safety. The killer is waiting, watching her every move—and he won’t stop until he’s exacted his revenge and reclaims his rights to raise his daughter.