‘You and I are going to have a chat. If you hang up, this girl dies.’

Adam Turner works the mid-dawn shift at his local radio station. From 12am to 6am, it’s his job to fill the airtime with old songs, inane chatter, and the occasional talkback caller. It’s a long way from his prime-time slot from over a decade ago, when he was a star in the making. Now there’s no producers, no billboards, no stakes, and, crucially, not many listeners. His frequent callers are drunk college students headed home from a night out, or long-range truck drivers. He is completely alone in the studio from midnight until dawn every night.

And then one night at 12:45am, he gets a different kind of call, with higher stakes than he could ever have wanted. The caller’s rules are simple – stay on the line, live on air, until dawn, or the woman they are holding captive will die.

The night wears on and Adam is tormented by his caller, forced to answer increasingly personal questions, exposing his fall from grace for all to hear. He must try to figure out just who is calling him, what they really want, and how he can stop them. All while staying live on air, and keeping the psycho talking.

But as the conversation gets deeper, is Adam willing to broadcast his darkest secrets to the world in order to keep a stranger safe?