 A nurse ( Teryl Rothery (qv)) who works in a home for the elderly in Massachusetts claims to have been raped by an invisible assailant. Mulder and Scully investigate, and soon find that the patients of the home are not quite what they seem. One of them appears to be seeing what isn t there, and the continued occurrence of seemingly inexplicable events (including apparent miracle cures for Alzheimer s Disease) point toward an extraordinary explanation.