Tom Beckwith has just quit his job as a police officer in order to study psychology. But his professor, Lauren Porter, is more interested in his criminology abilities than in his progress in psychology. Because of traumatic circumstances during her childhood she is suffering from multiple personality disorder, and it looks like her other ego may have killed someone. So Tom tries to help her by observing her, combining his professional abilities as an ex-cop and his recently gained knowledge of psychology.

Jim Belushi
as Tom Beckwith

Linda Hamilton
as Lauren Porter / Lena

Vera Miles
as Dr. Ruth Goldin

Elisabeth Moss
as Ronni Beckwith

Drew Snyder
as Robert Porter

Mark Lindsay Chapman
as Keno Sykes

Marc Poppel
as Detective Joe Gallo

Elizabeth Arlen
as Dee Harris

Josh Taylor
as Charles Duffy

Ken Kerman
as Detective Boyle