One Halloween, Ligiea Willard, stem-cell researcher and ex-roommate of Laura Hobson, is killed on her way to a reunion with Laura and another old friend named Ellen Jacoby. Her work attracted protests, and she was about to go public on shady practices at her institute. Psychic Ursula Van Tressell senses the killing and exorcises a house where the three women once lived at its owners' request.
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