Evelyn Rosethorne once saved Vampire King Lucian Draven from a burning church with her rare purifying blood, only to watch her half-sister Serena steal the credit. Believing Serena to be his savior, Lucian binds Evelyn as a decoy Blood Queen and repeatedly sacrifices her safety to protect the wrong woman. On their wedding day, Evelyn switches carriages and marries Cassian Nightvale, the blind Dark Duke cursed by an eclipse. Cassian craves her blood but refuses to take it without consent, and their guarded alliance grows into love. When Lucian uncovers the truth, he destroys Serena and begs Evelyn to return. She refuses, forms a permanent blood bond with Cassian, and leaves Lucian trapped in the immortality he once prized—alive forever, but unable to reach the woman who truly saved him.