There are rules for Voynich Woods: Always carry a whistle. Never go alone. Always come home before dark. And if anyone calls your name, don't answer. Because everyone who wanders from the path is never seen again. Except for Riley Walcott. Riley knows better than to stray from the trail in the woods behind her uncle Toby's house. But her little sister Sam breaks the rules in pursuit of a local legend, so Riley chases after her and discovers a knife-wielding figure and a waiting grave. Madelyn lives deep in the forest. Subject to her mother's strict rules, she's forbidden from leaving home or using her magic--but one night, she risks everything to help a stranger who's lost in the woods. Riley is murdered in a strange ritual, Madelyn uses her magic to resurrect her, and their lives are immediately entwined in the gnarled history of Voynich Woods. Riley, who feels trapped in her small town but too afraid to leave, was never a believer, but now the evidence is taking root under her skin.