The document outlines a pitch for a teaser trailer about a group of friends who are together at a house when a stranger knocks on the door. It describes the genre as British social realism and notes the setting will be a contemporary house. It discusses using diegetic and non-diegetic sound, including background music and its pacing. Camerawork will primarily use close-ups and medium shots to introduce characters in the main room before cutting to a hand slamming the door. Editing will use continuity initially and then cut quickly to the door slam for tension.