Man and Wife (1923)

After he is told of the death of his wife, Dora, in a hotel fire, Dr. Howard Fleming goes to the country hoping to ease his sorrow. While visiting a farm, he falls in love with and marries Dolly Perkins, who--unbeknownst to Howard--is Dora's sister. Howard is later told that Dora is actually alive, though hopelessly insane. He restores her sanity with surgery, but when Dora learns of Howard's bigamy, she has a relapse. A second operation kills her; Howard returns to Dolly, their child, and a happy future.