After their difficult night on the open water, the life raft is beached on a deserted island in Georgian Bay (part of Lake Huron). Each surviving teen must build three unique signals of some kind which will draw a rescuer's attention. But a thunderstorm rapidly approaches, putting the signals at risk.
Nicole is required to fake a medical emergency. The other four must transport the "injured" participant to a nearby log cabin, using only a compass for direction. If they make it to the cabin, they may use whatever supplies they find there. For some of the teens, the supplies prove more of problem than a solution.