A drifter enters a lonely house, unaware that it is actually an alien creature in disguise. Soon he realizes that he is a prisoner, along with several other half-mad inhabitants, but he is determined to escape.
Seeking help for an old man found dying in the road, a drifter named Wade enters a house that's actually a disguised alien doing research on the human equation. The math doesn't balance from several others trapped inside (a broker and his wife, a famous actress, and a sweet girl of 18), and the alien hopes Wade can provide the missing quantity for his formula.—statmanjeff