Vacationing on historic Nantucket Island, a teenage mystery writer and her friends must outwit two scheming thieves to solve the secret behind a legendary ghost story.Vacationing on historic Nantucket Island, a teenage mystery writer and her friends must outwit two scheming thieves to solve the secret behind a legendary ghost story.Vacationing on historic Nantucket Island, a teenage mystery writer and her friends must outwit two scheming thieves to solve the secret behind a legendary ghost story.