AN ANCIENT ARTEFACT.

A MYSTERIOUS ROBBERY.

A DEADLY ATTACK.

Jack, Scarlet and Mr Doyle embark on a hunt across Europe to locate the Broken Sun - an ancient artefact said to lead to the lost city of Atlantis - when it's stolen from the British Museum.

But just as the Broken Sun is within reach, Gloria, their beloved secretary is mysteriously poisoned.

In a race against time to find the antidote, the team uncovers a deadly plan that will strike at the very heart of government.

And no one has banked on another shocking discovery - that Mr Doyle's long-dead son may still be alive...