Professor Aurora Bell receives a message from space that simply states, "We're coming."

The message appears to be alien, and according to Professor Bell's calculations, the vessel that sent it is headed toward Earth and will arrive in three months. As the local population and the rest of the world begin to examine what a visitation from a superior alien force might mean, speculation looms about whether or not the message is a hoax. The arrival approaches, and Professor Bell and those around her become embroiled in the media circus. The politics and intrigue of the situation take on a life of their own.