Forsythe (Franchot Tone) and inexperienced Lt.Donald Stone (Richard Cromwell) - the raw and untested son of the garrison""s high-ranking commander.[Major Hamilton had arranged - without the knowledge of the colonel - for his son o be with the Bengal Lancers.Sandy""s conscience makes her skeptical and she questions their illegal, risky ""breaking and entering"" into the apartment - because "it is too weird.The film""s fictionalized plot was based on Lieut.William Pittenger""sDaring and Suffering: A History of the Great Railway Adventure(akaThe Great Locomotive Chase), a true Civil War story of the daring raid/seizure by a group of about two-dozen Union spies (led by civilian spy James J.Saito: That will not be necessary.(Saito turns and walks into his hut, as lightning claps are heard from tropical storm clouds overhead - a brief storm passes through.