The third in Cabot's dark reimagining of the Persephone myth takes the trilogy to a thrilling conclusion. As the story opens, 17-year-old Pierce Oliviera has accepted the love of John Hayden and must now live forever in the one place she's always dreaded most, the Underworld. The sacrifice seemed worth it because it meant she could be with the boy she loved. But now her happiness and safety are threatened because the Furies have discovered that John has broken one of their strictest rules: He revived a human soul. Pierce realizes that there's only one way to fix the balance between life and death. Someone has to die.