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In winter, the famous detective Gerard was bored. There are no tasty greens or tricky stories in the village of Vytivka, which are the best cures for boredom. But here's some entertainment: the Woodpecker Orchestra is coming to give a concert on St Nicholas Day in the ravine. And although Gerard is not a choral whistler, but a detective, there is work for him: the case of the prima capybara's fan. And he goes on stage, that is, to investigate. When rumours spread in the Village about the appearance of a black sparrow, who was doing his dark deeds, and sixty-eight sparrows hid in terror, how could Gerard stay away? And even on Christmas Day, when he was in the Carpathians, he not only luxuriated in listening to carols, but also looked for the lost pipe for Miska the bear. Because he is not a big mouse, but a famous detective. And it is a matter of honour for him to prove it!