With information obtained from Deep Throat, Mulder heads to Townsend, Wisconsin, to find evidence of a downed alien spacecraft before the military cleans up the area.
Scully's well deserved vacation is going terribly wrong and is landing her in a small Maine town where one of the residents is believed to be a witch and her autistic daughter's doll has frighteningly evil powers.
While investigating the connection between the abduction of several teenagers and a rural religious cult, Mulder & Scully discover a secret test being performed on the children using the "Purity Control" alien DNA from 'The Erlenmeyer Flask'.
When a tract of lonely woodland is cordoned off between laser fences, and rapidly changing explanations are rampant, Mulder's curiosity carries him beyond the bounds of official jurisdiction-and into the middle of a UFO cleanup.