A desperate remnant of humanity must rely on a psychic probe to find a new home before an ancient evil destroys their only hope. Humanity's home planet is rendered uninhabitable by a strange fungal growth, forcing survivors to place their faith in the Pritcher Mass, a device capable of searching psychic wavelengths for living worlds. However, an ancient evil from Earth itself appears to be actively working to prevent the Mass from succeeding, threatening to extinguish the last vestiges of the human race.

The premise of 'The Pritcher Mass' sets up a classic science fiction conflict between survival and an encroaching, ancient threat. The narrative likely focuses on the desperate efforts of the human survivors to utilize advanced psychic technology to escape their dying world. The opposition from an 'ancient evil' suggests a struggle that transcends mere environmental disaster, hinting at deeper, perhaps metaphysical, challenges to humanity's continued existence. The story appears to explore themes of hope, desperation, and the unknown dangers that may lie dormant within a species or its history.