'For you, voting Conservative would be just like adultery and you won't know what a pleasure that is until you've tried it!' Lucy tires of her husband, Barry, and his serial infidelities. She begins an affair with their mutual friend Tom, who responds willingly. Complicities, deceits and manipulations inevitably follow in a reflective story set amongst the chattering classes of South London during the months leading up to the General Election of 2005.