Waking up to a scorched sky, Beckett fears he is the lone survivor of a sudden global catastrophe. Stranded and isolated inside a seaside rental property, his remaining grip on reality rapidly unravels when he is confronted by a terrifying presence—the vengeful spirit of Joel, his abusive ex-husband. To survive both the unfolding global apocalypse and the primordial forces awakening around them, the estranged pair must directly confront the toxic, destructive history of their past life within high society.