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.