When the Hamilton family move into their new home in Cedar Grove, Connecticut, they think that all their troubles are behind them. Then one day young Timothy Hamilton discovers a clip of pre-historic Dinosaurs roaming the earth on an old portable television set while looking around in the upstairs attic. At first his parents dismiss the broadcast as nothing more than an old recording from a TV show or film. But as they continue to receive strange messages from the past, they begin to wonder if the broadcasts are in fact real. Then one evening they discover a broadcast of an airplane and its flight details a week before it explodes in mid-air. They then see a train leaving a railway station a few days before it is involved in a terrible crash. Could someone from the future really be sending messages back to the past warning of events yet to happen? What starts out as an innocent curiosity soon sets off a frightening and disturbing chain of events as the family try to warn the authorities of disasters and dangers that will soon come to pass and face a race for their own survival as an unknown enemy tries to thwart their plan to bring the broadcasts out into the open.
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