Richard Ciddle suspects his wife Clara of having an affair (as he himself is); when she admits it, he offers a divorce on the condition that he first meets her lover. Since she is not in fact having an affair, she invents one by kissing a stranger at London Airport, believing him to be about to fly out and therefore eligible for a mild deception. Not only is the man not leaving, he is subsequently hit by Richard's car, and the plan begins to unravel.
