Something very ancient and very evil is trapped in Walker's woods and 13-year-old Ennis Walker is its only hope of escape. How? Rescue twelve endangered natural objects, collect a talisman for each save, and pay for the Bolderdrub's release. With the help of friends Thena and Pat, Ennis finds himself saving all sorts of crawling and winged creatures and discovers a host of odd phenomena both in the woods and in himself.