SPOILER ALERT: the following article contains massive spoilers, including the ending. If you have not yet seen the movie, proceed at your own risk, or better, come back to this article later!
SPOILERS AHEAD
Dead Air Plot Summary
Cleaning out the home of his newly deceased mother, William stumbles across some belongings of his father, who died when he was just a boy. Among his father’s things, he discovers an old ham radio and, fascinated, attempts to use it. Over the airwaves, he stumbles upon a strange woman, Eva, who suffers from paranoia and agoraphobia, and hides a dark secret of her own. Wary at first, she slowly begins to thaw, and they strike up a distant friendship — their respective radios the only thread that connects them. But Eva isn’t the only thing that comes to him through the radio. Something desperate has stirred, attempting to reach William, to take hold of him and pull him into the shadow world of memories best left forgotten. The two worlds collide, and William is rushed down a path that is paved with deceit, lies and an awful truth, a truth that pulls him into a world of darkness from which he cannot escape.
Source: Wikipedia (CC BY-SA 3.0).