Michael Keaton plays successful architect Johnathan Rivers, whos peacefull existence is shattered by the unexplained disappearance + death of his wife Anna. Jonathan is eventually contacted by a man who claims to be receiving messages from Anna through EVP. At first sceptical, Johnathan then becomes convinced of the messages validity and is soon obsessed with trying to contact her on his own. His further explorations with EVP and accompanying supernatural messages unwittingly open a door to another world, allowing something uninvited into his life.