When Etor shows up on the doorstep of the wealthy Whitby family claiming to be a long-lost relative, Henry, the scion of the Los Angeles dynasty, hires psychic investigator Mason to find out whether the interloper really did come from a parallel universe. Why does the matriarch, Margaret, hiding upstairs in her room, refuse to meet Mason? And why has Henry taken such a personal interest in Mason? With help from a bizarre splinter of his own personality and his burgeoning psychic insights, Mason snoops around the palatial Whitby estate, digging into the long-held secrets of the family and staff, and with an excursion to New Mexico, uncovers the truth about Etor, the man from Grapalia.