Meredith Stone, a home care nurse, has been assigned the duty of looking after a wealthy invalid named Ivar Langrock. Cooped up in Langrock's stately country mansion, Meredith quickly suspects that someone sinister is lurking in the manor's dark halls only to discover that Ivar's demented and violent son has been locked away in a hidden room. Shortly thereafter, Ivar's grandson Gabriel also moves into the house and with his arrival a mysterious killer soon begins murdering members of the Langrock family along with their live-in staff.
Patricia Pearcy
as Meredith Stone
Joseph Cotten
as Ivar Langrock
David Hayward
as Jeffrey Fraser
John Dukakis
as Gabriel Langrock
Leon Charles
as Phillip
Alice Nunn
as Duffy
Patrick Pankhurst
as Wilfred Langrock
Louis Basile
as Taxi Driver
Abraham Alvarez
as Alex
Simone Griffeth
as Pamela Barton
James Purcell
as Detective
Shelby Leverington
as Additional Dialogue (voice)
