David Cronenberg tells the chilling story of identical twin gynecologists--suave Elliot and sensitive Beverly, bipolar sides of one personality--who share the same practice, the same apartment, the same women. When a new patient, glamorous actress Claire Niveau, challenges their erie bond, they descend into a whirlpool of sexual confusion, drugs, and madness. Jeremy Irons' tour-de-force performance--as both twins--raises disturbing questions about the nature of personal identity.