Professor Layton's daughter, Katrielle Layton, runs the Layton Detective Agency together with the talking dog Sherl and her assistant Ernest, and solves strange cases that happen everyday in London. Originally, she started the job with the purpose of finding her father, Hershel Layton, who had disappeared suddenly, but her incredible ability to solve puzzles made her well-known and she receives numerous requests.
Katrielle takes on a new case involving a young pianist who is being plagued by appearances of a doppelgänger.
Katrielle joins the investigation into a tragic incident that took place on the River Thames during the city's Riverside Festival.
Ernest recounts the time he was accused of stealing valuable research papers on his first day at Gressenheller University, and, in doing so, his fateful first meeting with Katrielle.
The Agency team find themselves on the run from the law after Katrielle is accused of a murder.
Katrielle finds yet another mystery on her hands when a celebratory treasure hunt on a luxury cruise ship's inaugural voyage goes awry.
Rosa returns to continue her story, and reveals the link between Katrielle's origins and the Professor's disappearance.
The two parties at last united, their path leads to the Greenwich Observatory for a final showdown with the man behind the entire conspiracy.
Rosa, an old acquaintance of Katrielle's father, visits the Agency with information relating to the Professor's disappearance eleven years ago.
The Agency is visited by a young boy named Leo who fears that the mysterious hero of London's streets, Ratman, has been kidnapped.
Katrielle is invited to the unveiling of Agency acquaintance and child genius Bengary's latest invention: Socketman, a robotic renaissance-manservant.
In search of sweets of legendary reputation, Katrielle is hooked when she is told that she will have to prove her connoisseur qualifications by locating the nearby store herself.
Travelling on board the Molentary Express for a special solar eclipse tour, the team find their attention divided when clients old and new describe a sequence of strange events.
The Agency attend the premier of a much-anticipated film, only to discover mid-scene that the moment of the climactic kiss has disappeared from the reel.
Katrielle is called to the estate of a millionaire gourmet with an unusual request: her pet has gone missing, and she wants it found before her dinner party commences.
Katrielle stumbles upon a fresh mystery when a classmate of Ernest relates the story of a mysterious bus journey that seemingly transported them back to the time of their childhood.
A young woman named Liv seeks Katrielle's help after she is visited by her late husband, Andy, apparently returned to life as a zombie.
Katrielle is approached by Pastel, a struggling musician, who claims that a strange dress he bought for his wife Olivia is causing her to become possessed.
Katrielle Layton, an intrepid investigator who heads up the three strong team at the Layton Detective Agency alongside her assistants Ernest and Sherl, takes on a case involving a mysterious house in which a new tenant's family suddenly and inexplicably disappeared.
The team becomes involved in a new case when a young man approaches the Agency in the hope of discovering a way to resume an implausible lucky streak.
Relaxing on a public holiday, the Agency team become embroiled in a highly unusual case when a desperate Inspector Hastings pleads their aid in finding a last-minute gift for his wife's birthday.
Katrielle and co. are left puzzled when Hastings requests their help on a case where the culprit has already been uncovered.
The team are summoned by a young heiress whose estate is seemingly being haunted by a host of ethereal apparitions.
Hastings turns to the Agency trio when London is menaced by a mysterious growling giant lurking in the fog.
The Agency receives a new mystery to solve when a young farmer details the unexplained appearance of strange patterns in their wheat fields.
The team are summoned by Inspector Hastings to the site of a seemingly impossible burglary: one hundred million pounds have vanished from a high-tech bank vault.
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