As Layton and Luke are invited to witness a demonstration of a time machine built by Dr. Alain Stahngun, the experiment goes awry, causing the disappearance of Stahngun and the prime minister, Bill Hawks. A week later, as numerous scientists have been reported missing, Layton and Luke receive a letter purporting to be from Luke ten years in the future, leading the two to a quaint clock shop in the London back alleys. Inside, the old couple show the two another time machine in the guise of a giant clock, and they find themselves in a drastically-changed quasi-steam punk London ten years from their present, where they meet the Future Luke. He explains that in this future, Layton has become the head of a mafia-like mob known as the Family and taken control of London, and decides to assist him. After briefly returning to the past to look up some files pertaining to an accident which claimed the life of his girlfriend, Claire, ten years ago, Layton and Luke return to the future London, inadvertently bringing Flora, Inspector Chelmey and his assistant Barton with him. As the group investigates the whereabouts of Future Layton, Luke is reminded that he will soon be moving with his parents.