Nick and Alison, a young couple although married for several years, find their sex-life is uninspiring. After much agonising, they decide to visit a wife-swapping club in a risky attempt to reinvigorate their marriage. However, after initial positive effects on their relationship, the activity begins to threaten the basis of their marriage.

• Martin Clunes
• Zara Turner
• Teresa Banham
• Ewan Stewart
• Ian McElhinney
• Nadia Cameron-Blakey
• Kacey Ainsworth
• Sarah Manners