Olsen, the last descendant of the Sacred Guardians, awakens after two centuries of imprisonment to discover that the order protecting mankind has long been destroyed. To break the seal consuming her life, she must fulfill an ancient blood pact by marrying Raymond Blackwood, heir to one of the four noble families. At Raymond's funeral, Olsen reveals he is still alive, breaks the dark curse binding his soul, and miraculously brings him back from the brink of death. Determined to claim her destined partner, she repeatedly saves Raymond from deadly curses and hidden enemies, while his powerful family mistakes her motives and rejects her. As an ancient evil rises once more and the truth behind the Blackwood bloodline unfolds, Olsen must protect the man bound to her fate before both the blood pact—and the world—are lost forever.
