Beverly Moss invites her new neighbours, Angela and Tony, over for drinks. She has also asked her divorced neighbour Susan, whose fifteen-year-old daughter Abigail is holding a party back in their house. Beverly's husband Laurence comes home late from work, just before the guests arrive. The gathering starts off in a stiff, insensitive, British-middle-class way as the virtual strangers tentatively gather, until Beverly and Laurence start sniping at each other. As Beverly serves more drinks and the alcohol takes effect, Beverly flirts more and more overtly with Tony, as Laurence sits impotently by.