based on novel   blackmail   love   male female relationship   deception   father daughter relationship   killer   freak   surgery   engagement   circus   unrequited love   liar   amputation   unnecessary surgery   amputee   surgeon   armless man   knife thrower   circus performer   arm amputation   silent film   obsessive love   blackmailer   circus train   fear of loving   frigidity   unethical doctor   death   doctor   murder   muscleman   revenge   knife throwing   self sacrifice   horse   death of father   murderer