Sana wrestles with haunting voices by day and ventures into a shadowy, half-remembered world by night. Unaware the voices she hears are vampires hiding in plain sight, tracking her every move, Sana believes she teeters on the edge of insanity.

Maysun, keeper of the world's spiritual balance, has passed her gift to her lover, Eoghan, but her timing could not be worse. If Charles Dunning, leader of the vicious vampire tribe the Shévet ha dam, discovers Sana—Maysun's own daughter—he could exploit the girl's resistance to the vampire curse, shifting the global power balance in his favor.

Vampire Vivian Black, host of the world's Source, must use her extraordinary power to find Sana before the Shévet ha dam. With Michael, her lover, and newfound friends wielding unique supernatural gifts, Vivian again finds herself in the global fight to keep the world from becoming overrun by darkness.