Because of his success surviving alone in the wilderness for fifty-four days, fifteen-year-old Brian, profoundly changed by his time in the wild, is asked to undergo a similar experience to help scientists learn more about the psychology of survival.

Although separated by continents and decades, Josef, a Jewish boy livng in 1930s Nazi Germany; Isabel, a Cuban girl trying to escape the riots and unrest plaguing her country in 1994; and Mahmoud, a Syrian boy in 2015 whose homeland is torn apart by violence and destruction, embark on harrowing journeys in search of refuge, discovering shocking connections that tie their stories together.

Instead of being rescued from a plane crash, as in the author's book Hatchet, this story portrays what would have happened to Brian had he been forced to survive a winter in the wilderness with only his survival pack and hatchet.