Arriving in the village for the summer holidays, Makar, Sonya and Ladoshka Veselovs think that they will have a very ordinary vacation. But Makar seems to attract trouble! Either a haystack next to him catches fire by itself and Makar is declared an arsonist, then at night in an abandoned estate a bell buzzes, which has not had a “tongue” for a long time. But the most extraordinary thing begins when Makar discovers a mysterious talent: he senses where ancient treasures are hidden underground. This talent turns out to be dangerous - because of it, they want to kidnap Makar. And if it weren’t for the help of his brother and sister, and most importantly, a smart house honor named Nyuk, even his ability to breathe underwater and fly through the air would not have helped the boy...