The mystery of the glittering moth

London is alive with preparations for Lord Beaucastle's grand masquerade ball - and with it comes a new scandal. A jewel of immense value has gone missing and Sophie and Lil are determined to find out where it ends up. Their plan is clear. Going undercover to the ball, getting in amongst the select company and keeping your eyes peeled. But dancing and eating cucumber sandwiches won't solve the mystery. They will have to untangle a web of lies, blackmail and crime that leads to London's most feared villain. And this time it could cost them their lives!