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Twenty-eight-year-oldSeanMcGillinseemsthepictureofyouthfulgoodhealth,untilhefracturesalegwhileskatinginNewYorkCity'sCentralPark.Hothing|ire-threatening,yetwithintwenty-fourhoursofhissurgicaltreatmentheisdead.Next,athirty-six-year-oldmother,DarleneMorgan,receivesminorkneesurgerytorepairatornligament-andwithintwenty-fourhoursshetoohasdied.HewYorkCitymedicalexaminersDr.LaurieMontgomeryandDr.JackStapletonappearagaininRobinCook'selectrifyingtwenty-fifthnovel,astheyconfrontaseriesofpuzzlinghospitaldeathsofyoungandhealthypatientsafterundergoingsuccessfultreatment.