A family flees their home planet only to crash in the hills above Riddle, Oregon. Earth's atmosphere transforms them at a genetic level and they learn that if they want to survive--they must feed. Teenagers partying at a cabin witness what they believe to be a burning airplane plummeting into the mountains. Upon investigation, they uncover an ancient terror marooned on Earth for centuries. United in a desperate fight for their own survival, the two groups come face to face with a 'Master Race' set to take over the world.