Thirteen-year-old Joy is doing almost nothing at school. There isn't a test she can't fail. But Joy has talent - she is very gifted musically. That is why you can so often meet her after school in Papas’s store, which helps the girl study music. And then one day Papas has a mysterious visitor who wants to sell him a horn from which enchanting music literally flows. But the price is too high, the seller wants gold, a lot of gold, and the music, heard once, haunts Joy and lures her to a magical land inhabited by beautiful unicorns, fauns and other fairy-tale creatures. But even a magical land has its problems, Joy worries about her new friends and tries to help them. The girl learns that it turns out that unicorns also visit our world, and some of them even live among us under the guise of people. Have you ever thought that a person you know might turn out to be a unicorn? Translation from English by Sergei Ilyin.