One of the most popular adventure style game, finally becomes an animation series on Fuji Television. Set in London, the main character is Katrielle Layton, the daughter of a professor. Whilst sustaining the willingness to solve any puzzles, Katrielle became a detective in order to seach for her missing father. With her talking dog Sherl and her assistant Noah, they run a detetive agency. With their fantastic puzzle solving ability, they soon become the center of attention, as they receive many requests from many, as they set out on many different quests solving different crimes in London on a daily basis.