Right before Inspector Lestrade's eyes, Professor Moriarty manages to steal a shipment of gold coins. But with Scotland Yard building roadblocks all over London, the professor finds it impossible to get his loot out of the city. Shortly thereafter, Mr. Gingham's office is broken into and documents about the new airship are stolen, Sherlock suspects.
Right before Inspector Lestrade's eyes, Professor Moriarty manages to steal a shipment of gold coins. But with Scotland Yard building roadblocks all over London, the professor finds it impossible to get his loot out of the city. Shortly thereafter, Mr. Gingham's office is broken into and documents about the new airship are stolen, Sherlock suspects.