When three emergency room patients die mysteriously all at once under his care, Mark clashes with his father, a hospital board member, over his contention that he saw several tiny snake-like creatures in the equipment -- but neither is unaware of the sinister force present that coincides with the arrival of a sickly elderly woman. Elmer, Marian and the rest of the ""Others"" rush to help Mark after he is struck down by a phantom illness, and they discover that the missing link might be the geriatric female patient who is deathly fearful of ""the Mora,"" fearsome monsters from Eastern European folklore. When they find talismanic fetishes under the beds of the deceased patients, the Others' suspicions focus on the Russian janitor, but he turns out to be attempting to ward off the evil. The old woman turns out to be a 110-year-old former ballet star who fled the Russian Revolution, leaving her infant son behind, and who is afraid to die until she learns what happened to her son; the Mora are,