There are no other beryls like these in the world and they would be impossible to replace. I leave it with you, Mr. Holder, trusting that it shall stay safe and sound.' Mr. Holder's life is turned on its head when a piece of the priceless crown he's been asked to guard goes missing. The police have no clues and only one suspect: Mr. Holder's own son. Everyone's hopes lie with Sherlock Holmes. But can the genius detective find the missing treasure before time runs out?