Professor Layton and the Unwound Future

Professor Layton and his assistant Luke attend the unveiling of a new invention called a time machine. The Prime Minister of London is volunteered as a test subject, but the machine explodes and there is no trace of him. With the Prime Minister missing, London is in chaos! Shortly after these events, the puzzle-solving pair receive a letter, which has apparently been sent by Luke's future self, stating that London is in serious trouble. The Professor and Luke follow the directions in the letter,...