Mackayla Lane's ordinary life in Georgia is shattered when her sister is murdered, propelling her into a treacherous world where the walls between humans and Faery are crumbling. In Dublin, the 22-year-old sidhe-seer must navigate dangers from both worlds as she searches for the Sinsar Dubh, an ancient book of deadly magic. Guided by the mysterious Jericho Barrons and tempted by the lethal Fae Prince, V'lane, Mac's quest thrusts her into the midst of an age-old conflict, making her the linchpin in the battle to protect both the Fae and human realms.