Since childhood, Nyssa has been accompanied by ethereal melodies that haunt her and sinister Shadows that follow her every move. Shunned from her stepfather's secretive business of curating art for the occult, her brother, Micah, and her best friend, Isabelle, are the anchors of her sheltered life. But when demons crawl out of the underworld and capture Isabelle, Nyssa risks her own life to rescue her, determined to find the demon responsible. She quickly learns that trust is fickle as a demon's bargain. When mysterious club owner Sam offers to help, and demons try taking her down, Nyssa hedges her bets. She will dance with the Devil and bargain if it means saving her best friend. But will Nyssa save Isabelle and escape the Devil's charm? Or will the darkness that's always trailed behind finally claim her...revealing secrets that were meant to stay buried?