The small, isolated town of Mammoth View is hit with terrifying news on a summer morning: a mysterious, large-scale attack is unfolding in the surrounding forest. It's not clear what happened, but it's bad. And it's not over. As residents flee in panic, Police Chief Hicks and his deputy set off into the woods to investigate. 

The attack seems like the perfect coincidence for Billy Lane. Looking for the biggest score of his career, he targets the local bank. The robbery does not go well—and the aftermath is even worse, leading the robbers to a nearby running camp for teen girls. 

Over the next twenty-four hours, chaos descends on Mammoth View as Billy, the police officers, and a courageous teen athlete at the camp face down murderous strangers and ghosts from their pasts—all leading back to what really happened outside of town.