The Keys family is vacationing at Shenandoah National Park intending to do some serious hiking, but twelve-year-old Marlon would much rather be on his phone talking with his friends at home in Chicago, and is further annoyed because the girl his own age, Nadia, turns out to be an experienced hiker; but when on the first day his complaining and resistance separates him from his parents his "boring" vacation becomes an exercise in survival as he and Nadia are caught in a storm.