The Asphyx

Utilizing an experimental photographic device, a scientist (Robert Stephens) captures what appears to be the image of the Asphyx -- the ancient Greek spirit of the dead. With the help of his adopted son (Robert Powell), he conducts further experiments and conceives of a way to harness the Asphyx and thereby gain immortality. But, as every visionary scientist should know, defying the laws of the natural and spiritual world unleashes dreadful consequences.