Ivy Calloway used to be a violinist with a future. Now she teaches lessons to bored rich kids and grieves her sister Rosalind, who died seven months into her marriage to billionaire Lucien Ashcroft - his seventh wife to die under his roof. When a stranger mails Ivy her sister's diary along with a warning - you're next if you marry him - she stops mourning and starts hunting. She engineers her way into Lucien's orbit and accepts his cold, transactional proposal. Not for money. For access - to the house where her sister died, the staff who watched it happen, and the man everyone believes is either a monster or cursed. What she finds is a fortress of secrets: dead wives who left behind fragments of truth, a family that treats murder like inheritance tax, and a husband who seems just as trapped by the pattern as his brides were. Lucien isn't the killer she wants him to be - but he isn't innocent either. As the walls between them crack, Ivy has to decide if loving him means forgiving his silence. And as the truth closes in, she has to decide what she wants more: to burn the Ashcroft empire to the ground, or to save the one person inside it worth saving. She came to become his eighth widow. She's about to become something the family has never survived - a wife who lives.