Jack and Kay's move into a new neighbourhood is welcomed by their friendly neighbours, Doug and Andrea, who invite them to their weekly summer garden party – but they are unaware the party is for swingers to meet and have sex with strangers. Meanwhile, Jack's work life takes an interesting turn when he is recommended for promotion into the position previously held by his best friend, Kevin, who is being squeezed out of the company. Jack, however, is unaware that Kevin and Kay are having an affair.