It was once the source of life, light and warmth but now the sun has turned the entire world into a baked and barren wasteland. Forests are scorched. Animal carcasses line the roads. Even the nights are dazzlingly bright. Marie, her little sister Leonie and Phillip are heading for the mountains. Rumour has it that water can still be found there but it is a hazardous trip into the unknown. Despite their struggle to overcome the odds, they are lured into an ambush and then the real battle for survival begins.