Lilith is the true Caldwell heiress, exiled as a child with her mother and raised into the underworld's most feared assassin. When the family needs a real daughter to seal a marriage alliance with the Vances, they drag her back to replace the fake heiress they've been parading for years.
She plays weak at first, then hits back hard at every slight from her stepfamily. Her fiancé Lucian, heir to the Vances, is faking paralysis to dodge his uncle's takeover, and he once saved her life without knowing her name. They spot each other's disguises fast and team up. Together they break the uncle's plot at a banquet and force the Caldwells to answer for framing her mother.
