When Raine Tallentyre journeys to Shelbyville, Washington, to clear out her aunt's house, her highly developed sensitivity leads her to a horrifying discovery: a young woman, bound and terrified, in a basement storage locker. The victim has survived, and the culprit is on the loose. Without warning, a new man enters Raine's life -- investigator Zack Jones. As a killer makes her his target, and a cabal of psychic criminals known as Nightshade operates in the shadows surrounding them, Raine and Zack must rely not only on their powerful abilities but on each other as well.