The disappearance of a young woman's father and a mysterious note years later after the strange regular annual delivery of valuable pearls to her puts Sherlock Holmes on the case.

A young lady, Miss Mary Morstan, contact Sherlock Holmes for his help regarding her father, captain Morstan, who disappeared 10 years ago. Since his disappearance she annually receives a valuable pearl by post from an unknown person. The mystery leads Holmes and doctor Watson into an intricate plot regarding a lost treasure belonging to four convicts on the Andaman Islands.—Mattias Thuresson

A young woman, Mary Morstan, comes to Holmes with a strange case. Her father, Captain Morstan, disappeared 10 years ago and has not been seen since. Starting four years after his disappearance she has received a valuable pearl each year from an anonymous benefactor. Now someone wants to meet her, saying that she has been wronged.—grantss