In Paris, the great surgeon Dr. Gogol falls madly in love with stage actress Yvonne Orlac, and his ardor disturbs her quite a bit when he discovers to his horror that she is married to concert pianist Stephen Orlac. Shortly thereafter, Stephen's hands are badly crushed in a train accident- beyond the power of standard medicine. Knowing that his hands are his life, Yvonne overcomes her fear and goes to Dr. Gogol, to beg him to help. Gogol decides to surgically graft the hands of executed murderer Rollo onto Stephen Orlac, the surgery is successful but has terrible side-effects...