And all that's left is a smoking ruin. Devastated by the demolition of their last hope, Ember and Chase follow tracks leading away from the wreckage - the only sign that there may have been survivors. With their high profile, they know they can't stay out in the open for long. They take shelter in the wilderness and amidst the ruins of abandoned cities as they follow the tracks down the coast, eventually finding refugees from the destroyed safe house. Among them is someone from Chase's past-someone he never thought he'd see again. Banding together, they search for a place to hide, aiming for a settlement a few of them have heard about...a settlement that is rumoured to house the nebulous organization known as Three. The very group that has provided Ember with a tiny ray of hope ever since she was first forced on the run.