四海皆兄弟，心连心共奋进。和朋友的妈妈结婚了

　　When she receives pearls beyond price and a mysterious message from an anonymous source, Miss Mary Morstan goes to the famous consulting detective of 221B Baker St., Mr. Sherlock Holmes for advice in how to answer the message. Together with his staunch comrade, Dr. John Watson, and a mutt named Toby, Holmes tracks down the secret of the Sign of Four.