22-year-old Anna Holland, codename "The Siren," knows two things: monsters are real and love is a lie. Rescued from certain death by a team of vampire hunters, she now works with them to trap and kill the savage predators. After one particularly dangerous hunt, she meets a handsome young man named Jason with a dark secret, and he becomes the next target of the hunters. But for the first time, the hunt goes awry, and Anna is captured.She soon learns that the war she's been caught up in is more complicated than she was led to believe and with far higher stakes than anything she's known. And then, she's captured again--this time, by a vampire who claims that she has a special role to play in the war. Now she must choose sides, and stay alive long enough to play that role...