Everyone knows the story of Katherine Pierce—the selfish vampire who ran from Niklaus Mikaelson for over five hundred years. What no one knows is that Katherine was never the only Petrova daughter. Centuries after helping her younger sister escape Bulgaria, Katherine’s older sister walks into Mystic Falls carrying old grudges, dangerous secrets, and a family loyalty that never died. Because surviving the Mikaelsons taught her one thing: The deadliest thing in the world isn’t a vampire. It’s a Petrova woman with something left to lose.