Sherlock Holmes' younger brother is annoyed that he has had to live in Sherlock's shadow for so long. When Sherlock goes to the continent, he sends a case to his brother who constantly tries with varying success, to imitate Sherlock's deductive and observational tricks.
The Adventure of Sherlock Holmes' Smarter Brother
The younger brother of the consulting detective tries to steal Sherlock's glory by solving an important case assisted by an eccentric Scotland Yard detective and a lovely but suspicious actress.