A brutal attack along the banks of the Seine in 1928 leaves a young Englishwoman close to death in a Paris hospital, without a memory in her head. She soon comes up against a vengeful husband who accuses her of the theft of priceless art, the French gendarmes who have linked her to a murder on the Riviera, and a scorned lover who is trying to kill her. The husband, believing his wife's amnesia is faked, spirits her away to an ancient chateau in the French province of Champagne, where prehistoric dolmens and standing stones dot the fields and caves hewn out of limestone are used for more than storing wine.