This film dramatizes the true story of Farley Mowat, when he was sent to the Canadian tundra area to collect evidence of the grievous harm the wolf population was allegedly doing to the caribou herds. In his struggle to survive in that difficult environment he studies the wolves, and realizes that the old beliefs about wolves and their supposed threat are almost totally false. Furthermore, he learns that humans represent a far greater threat to the land, and also to the wolves, a species which plays an important role in the ecosystem of the north.

The first remake of the paranoid infiltration classic moves the setting for the invasion, from a small town to the city of San Francisco and starts as Matthew Bennell notices that several of his friends are complaining that their close relatives are in some way different. When questioned later they themselves seem changed, as they deny everything or make lame excuses. As the invaders increase in number they become more open and Bennell, who has by now witnessed an attempted “replacement”, realises that he and his friends must escape or suffer the same fate. But who can he trust to help him and who has already been snatched?

Bill McKay is a candidate for the U.S. Senate from California. He has no hope of winning, so he is willing to tweak the establishment.