Layton Brothers: Mystery Room is a puzzle adventure video game for iOS and Android, published by Level-5. It is a spin-off of the Professor Layton series, following rookie investigator Lucy Baker, who works with genius detective Alfendi Layton, son of Hershel Layton, in a special department of Scotland Yard's crime investigation unit known as the "Mystery Room". The game was released in Japan on September 21, 2012, and in English on June 27, 2013. An Android version was released on September 5, 2013. Story The game is told from the perspective of newly minted detective constable Lucy Baker, who begins her new job at New Scotland Yard's "Mystery Room", a department of the Serious Crime Division that solves the cases no one else can. Working with Alfendi Layton, a brilliant but reportedly "unstable" investigator, Lucy discovers that he has a dissociative identity disorder over which he has no control. His alternate persona, which Lucy nicknames "Potty Prof", exhibits a largely uninhibited and sometimes vicious personality with a performative flair, professing an admiration of skilful criminals and the "beauty" of a clever murder, but holding a cold and unforgiving attitude towards the fates of perpetrators. Plot Arriving at Scotland Yard on her first day, detective constable Lucy Baker is advised by the Commissioner and his Deputy of her posting to a department of the Serious Crime Division nicknamed the "Mystery Room" as assistant to inspector Alfendi Layton, an apparent genius investigator. Upon their meeting, Alfendi has Lucy work alongside him to remotely solve the murder of a young woman at a seaside resort as a test. Managing to prove herself, the pair begin work together in earnest, solving a new case involving the death of a stay-at-home husband. During their inquiries, Lucy discovers that Alfendi has a "split personality", encountering his "deranged persona" for the first time in the middle of a climactic interrogation. After investigating the public shooting of a popular stage actress at the request of Alfendi's old partner, Justin Lawson, the duo set about examining a new case, an alleged "supernatural" locked room murder of an archaeologist in South America, who was rumored to have been the target of the curse of a (now stolen) stone idol he had uncovered. They discover that the killer is actually Chico Careta, a local guide, and that he was manipulated into the crime, and used as a scapegoat, by his fiancée,