Sixteen-year-old Carmel, California teenager Suze Simon is a typical high school student except for the fact that she is a "shifter" who can mediate between the living and the dead, and she is in love with a ghost from the nineteenth century.
Thirteen-year-old Cassie, the seventh child of a seventh child, begins to exhibit the gift of second sight which enables her to communicate with the Other World.
Three people find their lives in danger when a ghostly magician haunts them with visions of an extraordinary, deadly magic show he originally staged in 1936.
Mike and Susan feel a mounting sense of urgency and terror as they try to protect their younger brother who seems threatened by an invisible and powerful force in a house that has long been in their family, on which there is supposedly a curse.