As Mulder and Scully investigate, they discover a Malaysian orderly is illicitly giving the patients an herbal drug made of mushrooms he cultivates in the building's basement. The drug cures their Alzheimer's, but also allows them to see the spirits of people who have died in the nursing home and channel them into existence. In this state, the spirits assault and murder the orderlies that have looked down on them and treated them poorly while they were patients. When a patient overdoses on the drug, the spirits once again attack Charters, trapping her and Mulder in the bathroom, which begins flooding.