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简介：JessicaisonatrainheadedforElPasowheresheistolectureataconference.Shesharesatableinthediningcarwithawomanwhosubsequentlyvanishes,leavingherpurseonthetable.ThenamessageisannouncedforthewomanandJessicaacceptsit.Thisleadstoanattackinhercompartmentandademandfor'it'.Shehasnoideawhat'it'isandisrescuedbyamanclaimingtobeajournalist.Theplotthickens.SheiswarnedawaybyanFBIman,butcontinuestofollowhercluestoAguaVerdewherethewomanapparentlylives.Theplottwistsandturnsasshedelvesdeeperinamostdeviousmystery.....…