Sherlock Holmes. The Blue Carbuncle

The unique gemstone known as the Blue Carbuncle was stolen from the box of Countess Morcar. The countess offered a reward of one thousand pounds for any information that would help find the stone... While the London police try to track the missing diamond, which is impossible to even imagine in value, Holmes and his faithful friend Dr. Watson take on the investigation of this convoluted and mysterious case. They must not only solve the cunning crime but also save the life of an innocent person...