The Stone is an artifact from the Druid period still standing in a Chiltern (English) village; and not only does it bleep away in electromagnetic jolts, but every hundred years or so it clumps along down to the Well to drink, demanding blood and a human head. That's bad news for the Prior family--Gavin and Julia, lovely daughter Dr. Hilary, son Nick, and 14-year-old Vanessa; you see, they've moved to Chiltern just when the Stone is revving up for a gala-century marker. Sensitive Vanessa is the target. She will occasionally be inhabited by ""the Other,"" something ancient and nasty, and is pushed into some curious ritual duties by the mysterious Mrs. Hare, the pale flat eyes of whom cause Vanessa to pass out on first encounter. Meanwhile, poor Uncle Bran, a family friend, is being confused in the Stone's perception with another Bran, a decapitated hero from the Old Days. And there's a peaceful love affair going on between Hilary and young Adam Sandys, who sleuths around Vanessa's doings and alerts the group. Alas, poor Uncle Bran is not warned in time, but at least Vanessa is spared swinging an are since he's--ugh!--headless by--hah!--accident. Inane--but, in the comfy British-village narration, silly fun.