Once the source of life, light and warmth, the sun has now turned the entire world into a baked and barren wasteland. Forests are scorched. Animal carcasses line the roads. Even the nights are dazzlingly bright.

Maria, her little sister Leonie and Phillip are heading for the mountains in the search of rumoured water. Along the way they meet the mysterious Tom, who proves indispensible, but will he betray them at the next opportunity? As the tension grows, their paths cross with a new group of people and now their real battle for survival begins.