Stay on the roads. Don't enter the woods. Never go out at night. Those are the rules in Rowan's Glen, a remote farming community in the Missouri Ozarks where Ivy Templeton's family has lived for centuries. It's an old-fashioned way of life, full of superstition and traditions, and sixteen-year-old Ivy loves it. The other kids at school may think the Glen kids are weird, but Ivy doesn't care--she has her cousin Heather as her best friend. The two girls share everything with each other--or so Ivy thinks. When Heather goes missing after a May Day celebration, Ivy discovers that both her best friend and her beloved hometown are as full of secrets as the woods that surround them.