The game centers on Professor Hershel Layton, and his self-styled apprentice, Luke Triton, investigating the fictional village of St. Mystere about an artifact known as the Golden Apple, an heirloom that the late Baron had left as a test to determine who would receive his fortune after his death. The residents of St. Mystere particularly enjoy brain teasers, and will often ask the player to help solve them by using the system's touchscreen to submit answers. (wikipedia.org).