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.
After accidentally killing his fiancee, Anand becomes insane and is admitted to a psychiatric hospital. Tanvi, his doctor, falls in love with him, but her father does not approve, given his past.