Donald Stevens thinks his life is defined by his job as a bank manager. He sometimes wishes he had enough imagination or drive to have a mid-life crisis. Even his divorce seems to leave him little in the way of options, other than drink and casual sex. Then he has a chance meeting with an old college friend - what could be nicer than a weekend of reminiscing and catching up? He rapidly finds himself drawn in to a world completely alien to his middle-class existence. An experience that will change his life for ever.