Jack Reacher is on the road, hitching a ride with some earnest young Canadians who are planning a hike through some of the last unspoiled wilderness in North America in the dense forests of Maine. They part ways after sharing a hot meal, and Reacher checks out a quiet town surrounded by countryside serene enough to cool even his raging wanderlust. But not for long. First the trail is suddenly and inexplicably closed. Then the military police show up in force. Maybe it's a drill. Or maybe it's trouble.