Ep. 1: Katrielle investigates Simon Light's cursed house where his family vanished under mysterious circumstances.

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Katrielle Layton, daughter of renowned puzzle-solver Professor Layton, receives a distress call from Simon Light. He reports that his newly purchased home is cursed, causing his wife, two daughters, and Inspector Aspoirot to disappear without a trace. Fearing he is next, Simon seeks help. Katrielle travels to the residence accompanied by her assistant Noah and the talking dog Sherl. Upon arrival, she senses unsettling tensions within the property. The investigation delves into the fractured relationships among the missing family members and uncovers hidden secrets tied to the house itself. Katrielle must determine if she can truly solve any mystery, as her agency's motto claims, while navigating the eerie atmosphere and resolving the strange occurrences that have plagued the household.