A suburban couple decide to shake up their marriage by "swinging" with another couple.
Having met at University, American born Ellie (Mandy Moore) and her husband Alvin (Martin Freeman) are several years into their marriage. The heady sparks of lust and fun have sadly faded and they're left with the day to day normality of their everyday life. Advised by best friends Peter (Jonathan Silverman) and Janet (Melissa George), Ellie and Alvin are desperate to 'spice things up'. Having explored various options, Ellie hits upon the brilliant idea to mix things up with another couple - to have a 'consensual affair' within the confines of the marriage.
