Fifteen hundred years ago, Serenity Cardea took the life of the only vampire she ever regretted killing-Henry, her sister's husband. With her sister brutally murdered, Serenity had little choice but to grant Henry the only request he had: death. Centuries later, Serenity is no closer to discovering who betrayed them or instigated the massacre of her brothers and sisters. The vampires want dominance-over their food, the other races . . . the world. To get it, they've systematically hunted down and slaughtered the only ones standing in their way. The Keepers. As a Keeper, Serenity is tasked with protecting the delicate balance between the creatures of the world: Vampire, Witch, Were, and Human. Her kind exists to ensure that no single race sways the balance, dooming the world to destruction. They're on the brink of extinction, with no sign of return. Now only two remain, and Serenity's last brother is facing death, leaving her standing alone against a never-ending tide of vampires, all wanting one thing: power. Then she meets Ray Synclair, a history professor in training with a passion for centuries past, and the harsh reality of her limited time comes crashing down on her. He is her weakness. His mortality is the countdown on Serenity's life, and with each passing second, it comes closer to the end, for both of them. She must uncover the secrets of her people's past and find out who betrayed them-and who is still doing so-before it's too late. Serenity's days are numbered, and Ray will be drawn into a world of myth and legend, where just being alive is enough to get him hunted down. Because the only way to kill a Keeper is to kill their partner . . .