Eric Baxter doesn't ask for much. All he wants is to get his leg-over occasionally with his wife, Helen, and to lose enough weight to be able to see his genitals without having to hold his stomach out of the way. So when Carol - a randy work colleague and fellow food lover who almost seduced him the night before - turns up at his home and introduces herself to his wife, he begins to wonder whether life is playing a cruel practical joke on him. As Carol seems determined to make his life a misery for turning her down, and he's about to discover something's going horribly wrong in the trouser...