Disaster unfolds in Badger, a farming town in the state of New York when a meteor strike contaminates the air, turning it toxic. People begin to die. The entire town drop dead -plants, animals, and humans. Lauren, an exobiologist, tracked by Homeland security, is called in to find answers for this unearthly event. She reluctantly gets involved in the effort to solve the ensuing crisis.

Meanwhile, a gigantic tree, an other-worldly object has grown at the site of the meteorite impact. It becomes apparent, once was speculated to be a meteorite is in fact an experimental seed sent to Earth in their search for a new home. The seed is sent from a dying world, a desperate world in order to grow their trees to create a habitable environment for themselves on Earth and then colonise. Soon the air becomes more toxic and the human race stares at the verge of mass extinction.