Forty-three-year-old Lucas, a rich, divorced industrialist, is irresistibly attracted to thirty-eight-year-old Elsa, a renowned ceramist whom he's commissioned to create a fresco for his office foyer. But, still smarting from a recent disappointment in love, he asks Roland Christin, a private detective from his company, to discover the reasons why this lovely woman is still single.Without the slightest scruple, Roland puts the most modern of surveillance methods into operation. Lucas better beware if Elsa finds out.