Everyone knows that Alexander Utkin is a young, promising artist, but no one knows that he is also a young, promising detective! Well, what self-respecting detective would miss the opportunity to investigate a mystery, especially in France, next to an ancient castle? In this castle, someone first stole the royal seal, and then turned the priceless bed of the French kings into a pile of rags. But who committed the crime? Hooligans? Museum staff? Or maybe the mysterious old man who wanders near the castle on moonlit nights is involved - if this is not... a ghost?!! “How to approach this strange, mysterious matter?!” - Sasha reflects, and then his faithful rat, nicknamed Tolstoy, brings the main evidence... Previously, the story was published under the title “Fat - the Eater of Evidence.”