Deep in the underbelly of Montreal, an ancient evil stirs at the time of the Black Moon. Rumors dark as night seep into the public, spoken in hushed tones, as though those who speak are afraid to make the horrors they whisper of come alive. Azura, a student of witchcraft, wakes up to find her room empty. On her way to class, she finds out that her roommate has been murdered and that the Supernatural Intelligence Agency has been called in. With them comes Rook, the lead investigator, whom Azura finds herself helplessly drawn to. But while Azura is human, Rook is a werewolf, and their romance is as forbidden as it is strong. As the darkness draws nigh on the city, it falls on Rook and Azura to protect it—and themselves.