Why would someone steal a 4,000-year-old mummy's head? Is this the work of shadowy grave robbers or some weird ancient curse? Could the missing noggin be stuck in Mr. Klopper's gigantic, crumb-filled beard? Will a flaming torch be enough to battle Joe Sherlock's fear of the dark?

The man knocking at the door of 221 Baker Street has lost his head and is out of his mind with worry! A major scandal is brewing at the museum, and only Joe Sherlock can save Mr. Klopper from certain ruin. In this hushed underworld of eerie tombs, pickled kings, and water-filled surgical gloves, Joe finds his creepiest, most wrinkled-up case ever!