In April 1946, Tessa Field returns to Bramble Hill in the quaint Cornish seaside town of Covington Haven, England, after learning of her aunt Emily Maxwell's drowning in a boating accident. The moment Tessa sets foot on the grounds of Bramble Hill, long-dormant psychic powers are stirred in her. Through a series of eerie manifestations and unexplained mishaps, she senses an entity in the house is trying to make contact and reveal dark secrets. Tessa narrowly escapes being trampled by a horse ridden by the handsome aristocrat and writer Peter Tremayne, a childhood friend. Upon their unexpected reunion, Tessa is immediately attracted to him, and he to her. Yet, despite their budding romance, she soon becomes distrustful of his true motives. Convinced that her aunt did not die in an accident but was murdered, Tessa investigates and soon becomes entangled in a web of deception, betrayal, and treachery that threatens her very life.