For over thirty five years, Graham has climbed the same Derbyshire hillside on the 25th of July.

Armed with nothing more than an old military radio, a homemade aerial, and a notebook filled with decades of observations, he waits for a transmission from the mysterious beings he calls "The Others."

As a documentary crew follows Graham during the two days leading up to his annual vigil, what begins as the portrait of an ordinary man with an extraordinary belief slowly becomes something far more unsettling.

Is Graham simply clinging to a childhood memory... or has he been keeping a promise that was always meant to be fulfilled?