Toyama's wife Sada secretly earns money as a Geisha girl to finance his studies in America, but she says that the money comes from her deceased grandfather. In America, Toyama becomes an assistant to Dr. Stone, studying cures for inherited vices. When Toyama learns that Sada has been sentenced to death for murdering a prominent banker who attacked her, Toyama disappears and gives in to his hereditary tendency to drink until Dr. Stone cures him. Unknown to Toyama, Sada's sentence is commuted to life imprisonment when she gives birth to their daughter. Meanwhile, Toyama marries Stone's half-Japanese daughter Emily to fulfill Stone's dying request. In Japan, after Toyama lectures women prisoners and recognizes Sada, he discovers that the child he and Emily adopted is really his own daughter. When Sada escapes and finds Toyama, he decides to commit harakiri, but as the prison guards approach, Sada drowns herself to save him.