White Noise is a supernatural horror story about a man named Jonathon Rivers who is a successful architect living with his wife Anna until one day she suddenly disappears. After some time he is contacted by a man named Raymond Price who claims he has recorded messages from Anna. Raymond's son past away and he became involved with Electronic Voice Phenomena, or EVP for short. This just angers Jonathon and he dismisses Raymond, at first.
Jonathon later finds out that his wife died by drowning. Desperate for answers he turns to Raymond and he starts believing that Anna really is the voice he is hearing. Jonathon himself then becomes obsessed with the idea of communicating with Anna through EVP, even though a psychic warned him of the dangers of these recording. EVP wouldn't only put him in contact with his dead wife, but could also invite other unwanted entities.
He then befriends a woman named Sarah Tate who had lost her fiancÚ and while working together to get answers, they go back to Raymond to find he is now dead. Things start getting worse as 3 demons being following him due to his new found obsession. He soon learns that some of the messages he's hearing are actually from people who aren't dead yet.
Jonathon tries to save a woman and a child, but only can save the child. He then finds out about a missing woman named Mary. Soon after Sarah is possessed by a demon and falls from a balcony causing serious injuries. Jonathon then finds the site of his wife's death to find a construction worker holding Mary captive. While trying to save Mary, the 3 demons attack Jonathon, killing him. After his funeral, his son gets in a car and hears his dad over the radio saying, "I'm sorry". The boy recognizes the voice of his father and just smiles.