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Dr. Watson got married. Three months after this, Sherlock Holmes came to him and offered to take part in the investigation of a new case. The client was Mr. Pycroft. Mr Pycroft had worked as a clerk in one firm for five years until it went bankrupt. Mr. Pycroft started looking for a new job. One evening a certain Arthur Pinner came to him. Mr. Pinner offered him a very good job. Pycroft immediately got an advance and had to write a statement. But there was one condition not to tell anyone anything. The next day Pycroft went to his new office. But this place was terrible and his first task was to rewrite the directory. And the incredible resemblance between his employer Arthur Pinner and his current boss Harry Pinner surprised him most. They were brothers. But why was the crown on one tooth the same?