Finding herself stranded after work one night, airport cleaner Lena accepts an offer of help from perky colleague Birdie, who lives nearby with her closeknit family. But Birdie's front door proves to be the gateway to a very British sort of nightmare … This genuinely shocking, darkly witty Brit horror pushes all the boundaries – as well as offering a troubling alternative explanation for the recent chaos at a certain new flight terminal. Contains scenes which some viewers may find disturbing.