Early 1970s cult British horror starring Robert Stephens and Robert Powell. The Asphyx - the spirit of Death - enters the body at the precise moment the soul is released. Each person has their own Asphyx and if it can be captured the person can theoretically live forever. Sir Hugo (Stephens), through his interest in photography and metaphysics, captures the Asphyx on film. When his son dies in a boating accident, Sir Hugo becomes obsessed with immortal life, with terrible consequences.