John Arnold DeMarco is a man who believes he is Don Juan, the greatest lover in the world. Clad in a cape and mask, DeMarco undergoes psychiatric treatment with Dr. Jack Mickler to cure him of his apparent delusion. But the psychiatric sessions have an unexpected effect on the psychiatric staff and, most profoundly, Dr Mickler, who rekindles the romance in his complacent marriage.

Millionaire industrialist Steven Taylor is a man who has everything but what he craves most: the love and fidelity of his wife. A hugely successful player in the New York financial world, he considers her to be his most treasured acquisition. But she needs more than simply the role of dazzling accessory.

An immature, newly unemployed comic must navigate the murky waters of adulthood after her fling with a graduate student results in an unplanned pregnancy.