Against impossible odds, Thomas Wilson survives the first three waves of the alien invasion, holding on to the equally impossible hope of finding his identical twin brother, Oliver. Driven by his love and duty to his family, he refuses to give up, joining a group of soldiers in a last-ditch attempt to defeat the alien invaders. But when the aliens turn out to be more insidious than ever expected, will the powerful bond between Thomas and Oliver be the mechanism of humanity's survival, or the implement of its destruction?