Cadence made a devastating choice when she defied the Guardian Leader and opened a portal to resurrect her best friend from the dead. But her act of desperation came with a catastrophic price—two demonic vampires slipped through the veil alongside him, bringing untold darkness into the world. Now the clock is ticking. These ancient creatures are building an unstoppable army of the undead, with one goal: obliterate the LIGHTS team and everyone they protect. Hundreds of innocent lives hang in the balance, and every Hunter stands on the brink of extinction. Cadence has already defeated these vampires once, but bringing them down a second time demands something she may not possess—the strength to finish what she started. As the legendary Vampire Hunter and member of LIGHTS—an elite faction of Hunters and Guardians sworn to protect humanity from the supernatural horrors lurking in darkness—Cadence must race against time to hunt down her enemies and seal them away forever. Failure is not an option. The fate of the entire world rests on her shoulders.