The Tree Runners are a group of people working together up in the trees. They depend on each other for survival. The other groups are Tree Whisperers and the Tree Pitchers. Everything goes according to plan in the Tree Runner's group according to the almighty-Evan, until his house was broken into. It's not like Olivia, Anne, Laura, Jessica, Dan, Tanner,and Morris meant any harm. That's not the way Evan sees it. They group faces a difficult journey, and soon everyone will figure out there's always a monster lurking in the darkest hour.