To celebrate her husband's 50th birthday, Fiona organises a camping weekend with friends Kerry and Adam. Her meticulously planned trip is thrown off course by the arrival of Tom and his uninhibited new partner Fay.
As the group settles uneasily into the weekend a visit to the beach results in a trip to A&E with Archie, Robin and Fiona's mollycoddled son. Tom and Fay have noisy sex in the changing room of a shop.