Complex sentence: 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.
Split into simpler sentences: A week later, Layton and Luke receive a letter purporting to be from Luke ten years in the future. The letter directs the two to a quaint clock shop in the London back alleys.