Fleeing their homes in the city, three teens find themselves on the run with little kids in tow. As people vanish and buildings crumble, they seek shelter in the nearby mountains. Survival depends on their ability to adapt with nothing more than the items pilfered from a crumbling store. Hovering in the background is the constant threat of being discovered by the aliens, adding to the pressure the teens feel having no shelter, a limited supply of food and the well-being of three children to ensure. They must come up with some creative solutions before the inevitable onset of winter, while attempting to remain "invisible" to avoid capture. Being mature and responsible is no longer optional as they deal with their individual personalities, traumas, and learn to raise a baby. Unaware of the extent of the alien destruction, they can't help but wonder if all their efforts are in vain.