Mark and Ellen, step-father and daughter, struggle to survive together in an apocalyptic World, destroyed by an unknown monstrous species nicknamed 'Harvesters'. They stumble across good fortune; a map leading to a refuge camp. Overcome with hope, Mark leads them on a daunting trek to find shelter. Along the way they're haunted by ghosts of their past and chased by behemoth machines. But, they must put this behind them to face a terrifying new threat that awaits them, lurking in the forest.