When New York is caught in the grip of a sadistic serial killer who preys on patrons of the city's underground bars, young rookie Steve Burns infiltrates the S&M subculture to try and lure him out of the shadows.

Al Pacino
as Steve Burns

Paul Sorvino
as Capt. Edelson

Karen Allen
as Nancy Gates

Richard Cox
as Stuart Richards

Don Scardino
as Ted Bailey

Joe Spinell
as Patrolman DiSimone

Jay Acovone
as Skip Lee

Gene Davis
as DaVinci

Randy Jurgensen
as Det. Lefransky

Barton Heyman
as Dr. Rifkin