Serena is a human-werewolf hybrid who became Roan Vanderbilt's nominal stepsister when her mother married into the pureblood clan. For five years she has secretly served as the antidote to his moon madness, absorbing his possessiveness and his humiliation without a word. When Roan gets engaged to Eliza, a councilman's daughter, to secure the family's standing, Serena finally leaves for London.
There she builds a real life as an appraiser under the protection of Robert Carter. Roan only understands what he lost when the blood bond backlashes and he realizes Serena is his fated mate, and he follows her across the sea refusing to let go. But the Vanderbilt family wants her executed to protect their honor, and the woman wearing Eliza's name is not who she claims to be.
