When old school friends Angie and Fiona bump into one another at a rather drunken timeshare event aboard a barge on the river Thames, their reunion will prove to be auspicious. Bored with her life, Fiona insists they both need some excitement. Their marriages have grown stale; their previous hopes and dreams confined to the top shelf, just out of reach. Both women crave romance, not a timeshare apartment. Timesharing a lover; now that would be interesting.
Auditions are swiftly convened at London Zoo, with hopefuls including a language student, an opera singer, and a pickpocket. Their advert also falls into the hands of a young lawyer called Jake, a colleague of Angie's solicitor husband on a sperm-ownership case. To make sure they each play fair, the women create a list of rules by which they will court and enjoy a man of their mutual choosing. But when has love ever been fair, especially amongst friends?