A Londonbanker makes a business trip to Venice where he falls in love with a woman who thinks her boyfriend is cheating. They get married.
Two years have passed and she is bored because he is indeed a "model husband" who never looks at other women and who other women show no interest in. Apparently she wished for a model husband but unconsciously desired a Don Juan. Once he understands, he acts like one (a little) and she falls in love with him all over again.