Henry Hawksworth is a man menaced by a multiple personality. There is Dana, the conservative family man; Johnny, violent and sociopathic; Peter, creative and childish; and Phil, protective and unemotional. "Dana" falls in love with Ann and marries her. Following a crime, "Johnny" is arrested and tried. In court, Henry's multiple personalities are painfully revealed.

David Birney
as Henry Hawksworth

Dee Wallace
as Ann

Mitchell Ryan
as Dr. Ralph B. Allison

John McLiam
as Father

James Whitmore Jr.
as Harry

Ben Piazza
as Neurologist

Judith Chapman
as Sally

Robert L. Gibson
as Fred

Herb Armstrong
as Bowling Alley Manager

Liam Sullivan
as Prosecutor