Seventeen-year-old Leonie Vernier and her brother abandon Paris for the sanctuary of their aunt’s isolated country house near Carcassonne, the Domaine de la Cade. But Leonie stumbles across a ruined sepulchre - and a timeless mystery whose traces are written in blood.

Meredith Martin arrives at the Domaine de la Cade to research a biography. But Meredith is also seeking the key to her own complex legacy and becomes immersed in the story of a tragic love, a missing girl, a unique deck of tarot cards and the strange events of one cataclysmic night a century ago…