A psychiatrist must cure a young patient who presents himself as Don Juan, the world's greatest lover.

Well-respected psychiatrist Dr. Jack Mickler is only 10 days away from retirement. A week before he's supposed to leave, he encounters a young man who attempts suicide--a pretty straightforward case, except that the young man claims to be Don Juan, the fabled Spanish nobleman and world-renowned seducer/lover of women. Despite original hostility from his co-workers, Jack manages to persuade his associates to put the youth in his care for 10 days after which the youth will undergo an evaluation to be either released from psychiatric care or sent to a mental institution. However, as the days progress, Dr. Mickler and the other staff are gradually drawn into the young man's exotic world of love, passion, and pleasure as he tells them the story. While he speaks, the young man's philosophies and zeal for life and love start to revive Dr. Mickler's somewhat-passionless relationship with his wife Marilyn, as well as challenging his own views and ethics to the point where both he and the audience begin to question: could this young man actually be Don Juan?—LadyN1

In present-day New York, a young man believes he is Don Juan, aware of where he is and that this is the 20th century. Regardless of the validity of his claim, he is able to seduce women in his complete conviction of who he is. He becomes under the psychiatric care of soon-to-be retired Dr. Jack Mickler at Woodhaven State Hospital when he becomes suicidal over losing whom he believes is the love of his life, Doña Ana. Don Juan believes that Jack is nobleman Don Octavio de Flores. As Jack tries to convince him that he is not Don Juan in what are Jack's final 10 days of practice, the two come to an agreement that Don will do whatever Jack says, including being medicated and possibly being committed, once Don cannot convince Jack of who he says he is. As Don tells Jack his story, Jack eventually meets people who purportedly know Don and provide Jack conflicting stories both to each other and to Don's account of his life. Beyond what Don tells him, what Jack decides to do is influenced by the pressure he is receiving from the hospital's chief of staff, Dr. Paul Showalter, not to confirm the notion of Jack having chosen his work over these last few years of his practice, and the type of retirement life he wants with his wife of 32 years, Marilyn Mickler.—Huggo

Feeling rejected, a mysterious masked man catches the eye of the highly regarded clinical psychiatrist, Dr Mickler. But with only ten short days standing in the way of his scheduled retirement, Dr Mickler is sceptical of the stranger's claims: in all seriousness, the young man believes he is the legendary Don Juan, the world's greatest lover. Having a few days to evaluate and cure the delusional patient whose big doleful eyes make a woman's heart melt, Dr Mickler starts falling under the sad Don's spell, ushering in a new era of change in his uneventful life. However, the question remains. Who is the man behind the leather mask?—Nick Riganas