For Eila Walker, history has become its own demon. After months of trying to keep ahead of those who are hunting her, Eila is more than ready to end her days of running. But her ancestor, Elizabeth, has left a twisted legacy in her wake that shadows Eila still, nearly 170 years later. When her grandfather reveals that he has kept a priceless piece of the past hidden in his vault on the island of Polaris, Eila and her friends are hopeful they may finally find the answers they so desperately need. But just when Polaris is beginning to feel like a safe haven, a brutal attack leaves the group shattered. Eila, desperate to end the violence, soon finds herself drawn into the decadent underworld of the Mortis, where lies become truths, and allies . . . become killers.