Mystery, danger, and intrigue begin when two kids and their dog unearth a crooked stick on a hilltop. Suddenly trees spring up in the middle of roads, driveways and cornfields. No one can explain their mysterious appearance. Ten-year-old Matty and her nine-year-old brother Ryker think there's something strange about a crooked stick their dog Amos dug up while the three were exploring. As they spend their spring break trying to unravel the mystery, the situation turns dangerous. A crazed farmer threatens them, their bicycles are stolen, someone secretly spies on them, and Amos is attacked. The children ride biplanes and horses, run for their lives from forest fires and explosions, and offer tearful confessions before the deadly conclusion to their investigation.