Dead Man Running's Tamer Hassan and Danny Dyer explosively reunite for this taut action-thriller in which a cataclysmic event has left London deserted and under the thrall of a sinister presence. When William (Simon Phillips) awakes from unconsciousness, he finds himself confused and alone in an empty London street. As he explores the area, he discovers that not only are all the people missing but so are his memories. A chance encounter teams him up with six other lost souls, led by soldier Jack, who are all haunted by fractured memories of a devastating event. After a terrifying attack on one of the survivors, Jack realises they are not the only survivors and the race is on to escape the capital and the darkness that stalks its desolate streets.