The American Dream of the dentist David Hurst is complete: he is married with his sweetheart from the dental school, the also dentist Dana that works with him and is an aspirant opera singer; he has three lovely daughters; he lives in a very comfortable house; and he has his own business. David is presently treating the troubled blunt musician Slater, having a complicated relationship with his client. When David glances his wife in the backstage of the theater before a presentation of Nabucco, he sees a man caressing her and he imagines she is having an affair. The repressed David becomes mentally ill and uses Slater as his alter-ego to express his anger while fantasizing the relationship of his wife and fighting to keep his marriage.