New York police officer is offered job in secret agency that deals with the crimes commited with aliens, who live on Earth. Or just visiting friends...
When virus kills most of the population and turns the rest in aggresive mutants it is up to people like Robert Neville, who are immune to the virus, to keep alive the human kind.
1000 years after human kind was forced to leave the Earth father and son accidentally return to the planet and that visit will change their relations forever.