After their father dies, young twin brothers Holland (Martin Udvarnoky) and Niles (Chris Udvarnoky) spend their summer playing around the farm, while their mother (Diana Muldaur) hides in mourning. Holland is the more mischievous of the two, while Niles is shy and quiet. Their grandmother, Ada (Uta Hagen), has taught Niles how to project himself into other people and animals as a harmless game. But when a series of deadly tragedies strike the family and friends, only Ada suspects the truth.