Professor Stock and his wife, Mizzi, are always bickering. Mizzi tries to seduce Dr. Franz Braun, the new husband of her good friend, Charlotte. Dr. Braun's colleague, Dr. Mueller, who has had his eye on Charlotte, sees this as his opportunity, even though the Braun's are very happily married. Through a misunderstanding, Charlotte thinks that her husband is interested in Miss Hofer, and asks Mizzi to keep him occupied. Meanwhile, Professor Stock becomes suspicious of his wife, and hires a detective to spy on her, with the hope of obtaining a divorce.