After a summer cooped up in his family's store selling bait, tackle, and soft drinks to tourists, fourteen-year-old Chase finally gets a chance to go on his first solo geocaching adventure. Using his GPS in the foothills of the Arizona White Mountains, he uncovers the geocache—a small metal box—hidden deep in the woods in some undergrowth. Inside, with a few plastic army men and a log book, is a troubling message asking for help in a child's handwriting. When Chase returns later, he finds another message in the geocache box, this time asking for food. He is curious—and worried—about the mysterious individuals leaving the messages. Before he can turn to the adults around him for help, Chase is pulled into a complex, dangerous drama and a chilling confrontation with an unstable father who will stop at nothing to hold on to his children. Young readers will learn all about the high-tech adventure game of geocaching in Katy Grant's exciting novel that features heart-pounding action and surprising plot twists.