Angela Ledore, an old high school friend of Layton's, calls Layton to the town of Monte d'Or to investigate the self-proclaimed Masked Gentleman who has been performing terrifying 'miracles' using the power of an artifact called the Mask of Chaos. Eventually, Layton deduces that the Masked Gentleman is Randall Ascot, his best friend from high school, who was presumed to have fallen to his death in the Akbadian ruins eighteen years prior but had actually survived (albeit with amnesia). Jean Descole soon appears, however, and reveals that the Akbadain ruins were the last of the Azran Legacies. Descole states he had planned for Professor Layton to solve the mystery of the Nautilus Chamber (Infinite Vault in the UK) of Akbadain, reviving the lost power source of the Azran Civilization.